Re-publish Scharf Insecticide MOA session with updated deliverables
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Rich Braman
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Matching
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Principles of Insecticide Mode of Action — Dr. Michael Scharf
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CHAIN OF CUSTODY
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Matching Exercise 1: Insecticide Classes and Their Target Sites
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Matching Exercise 2: Insecticide Mode of Action Effects
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Matching Exercise 3: Practical Factors Affecting Insecticide Performance
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Principles of Insecticide Mode of Action — Dr. Michael Scharf
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Matching Exercise 1: Insecticide Classes and Their Target Sites
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<h1 id="matching-exercises-scharf-insecticide-moa">Matching Exercises — Scharf, Insecticide MOA<a class="headerlink" href="#matching-exercises-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
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<blockquote>
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<p><strong>Placeholder</strong> — Paste your Stage 4 pipeline output here.</p>
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</blockquote>
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<h1 id="gtbop-moodle-matching-exercises">GTBOP Moodle Matching Exercises<a class="headerlink" href="#gtbop-moodle-matching-exercises" title="Permanent link">¶</a></h1>
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<h2 id="principles-of-insecticide-mode-of-action-dr-michael-scharf">Principles of Insecticide Mode of Action — Dr. Michael Scharf<a class="headerlink" href="#principles-of-insecticide-mode-of-action-dr-michael-scharf" title="Permanent link">¶</a></h2>
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<p><strong>Webinar Date:</strong> October 18, 2017
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<strong>Series:</strong> Structural Pest Control
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<strong>Activity Type:</strong> Matching Exercises
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<strong>Exercises:</strong> 3
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<strong>Total Pairs:</strong> 26 (8 + 10 + 8)</p>
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<hr />
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<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
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<h3 id="chain-of-custody">CHAIN OF CUSTODY<a class="headerlink" href="#chain-of-custody" title="Permanent link">¶</a></h3>
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<ul>
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<li><strong>Source documents:</strong> Corrected SRT (GTBOP_Transcript_2017-10-18_InsecticideMOA.srt) + Archive Package (GTBOP_Archive_Summary_2017-10-18_InsecticideMOA.md)</li>
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<li><strong>All terms, definitions, and relationships derived exclusively from presentation content</strong></li>
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</ul>
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<hr />
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<h3 id="matching-exercise-1-insecticide-classes-and-their-target-sites">Matching Exercise 1: Insecticide Classes and Their Target Sites<a class="headerlink" href="#matching-exercise-1-insecticide-classes-and-their-target-sites" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 28:40 – 39:05 (primary coverage area)
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<strong>Type:</strong> Product-Target Site Matching</p>
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<p><strong>Instructions:</strong> Match each insecticide class in Column A with the target site it affects in Column B. Note: Column B contains two extra items.</p>
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<table>
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<thead>
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<tr>
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<th>#</th>
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<th>Column A</th>
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<th></th>
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<th>Column B</th>
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<tr>
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<td>1</td>
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<td>Pyrethroids</td>
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<td></td>
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<td>a) Chloride channels</td>
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<td>2</td>
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<td>Fipronil (phenylpyrazole)</td>
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<td></td>
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<td>b) Acetylcholine receptor</td>
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<td>3</td>
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<td>Nicotinoids</td>
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<td></td>
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<td>c) Muscular calcium channels</td>
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</tr>
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<td>4</td>
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<td>Organophosphates and carbamates</td>
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<td></td>
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<td>d) Axonal sodium channels</td>
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<td>5</td>
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<td>Diamides (chlorantraniliprole)</td>
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<td></td>
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<td>e) Acetylcholinesterase enzyme</td>
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<td>6</td>
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<td>Indoxacarb (oxadiazine)</td>
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<td></td>
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<td>f) Mitochondria (energy production)</td>
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<td>7</td>
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<td>Abamectin (avermectin)</td>
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<td></td>
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<td>g) Chitin synthesis enzymes</td>
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<td>8</td>
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<td>Chitin synthesis inhibitors</td>
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<td></td>
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<td>h) Glutamate-gated chloride channels</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td>i) Juvenile hormone receptors</td>
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</tr>
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<td></td>
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<td></td>
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<td></td>
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<td>j) Axonal sodium channels (blockage)</td>
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</tr>
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</tbody>
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</table>
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<p><strong>Answer Key:</strong>
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1 → d, 2 → a, 3 → b, 4 → e, 5 → c, 6 → j, 7 → h, 8 → g</p>
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<p><strong>Notes:</strong>
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- Items 1 and 6 both target sodium channels but through opposite mechanisms (stimulation vs. blockage), which is why they map to separate entries (d and j). This distinction is a key teaching point from the presentation.
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- Distractors: (f) mitochondria and (i) juvenile hormone receptors are legitimate target sites discussed elsewhere in the presentation but do not match the classes listed in Column A.</p>
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<p><strong>Source in transcript:</strong> Blocks 301–343 (target site roadmap), 346–362 (sodium channels), 363–387 (chloride channels), 388–407 (acetylcholine), 429–444 (diamides), 466–482 (IGRs)</p>
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<hr />
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<h3 id="matching-exercise-2-insecticide-mode-of-action-effects">Matching Exercise 2: Insecticide Mode of Action Effects<a class="headerlink" href="#matching-exercise-2-insecticide-mode-of-action-effects" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 17:51 – 47:00 (spans full classification section)
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<strong>Type:</strong> Product-Effect Matching</p>
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<p><strong>Instructions:</strong> Match each insecticide or insecticide class in Column A with the physiological effect it produces in insects, as described by Dr. Scharf, in Column B. Note: Column B contains two extra items.</p>
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<table>
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<thead>
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<tr>
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<th>#</th>
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<th>Column A</th>
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<th></th>
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<th>Column B</th>
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<td>1</td>
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<td>Pyrethroids / pyrethrins</td>
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<td></td>
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<td>a) Blocks chloride channels, causing nervous system excitation</td>
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</tr>
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<tr>
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<td>2</td>
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<td>Fipronil</td>
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<td></td>
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<td>b) Stimulates muscular calcium channels, causing contraction followed by energy depletion and paralysis</td>
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</tr>
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<td>3</td>
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<td>Indoxacarb</td>
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<td></td>
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<td>c) Stimulates sodium channels, causing rapid knockdown and excitation</td>
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</tr>
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<tr>
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<td>4</td>
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<td>Organophosphates</td>
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<td></td>
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<td>d) Inhibits chitin synthesis enzyme, causing death during molting</td>
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</tr>
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<tr>
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<td>5</td>
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<td>Diamides</td>
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<td></td>
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<td>e) Blocks sodium channels, causing paralysis ("on switch stuck in off position")</td>
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</tr>
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<td>6</td>
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<td>Juvenile hormone analogs (pyriproxyfen)</td>
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<td></td>
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<td>f) Inhibits acetylcholinesterase, causing excitation from neurotransmitter buildup</td>
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</tr>
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<td>7</td>
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<td>Chitin synthesis inhibitors</td>
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<td></td>
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<td>g) Mimics juvenile hormone, causing cuticle deformation and extra juvenile stages</td>
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</tr>
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<td>8</td>
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<td>Abamectin</td>
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<td></td>
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<td>h) Stimulates chloride channels, causing inhibition and paralysis</td>
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</tr>
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<tr>
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<td>9</td>
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<td>Silica gel / diatomaceous earth</td>
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<td></td>
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<td>i) Abrades waxy cuticle layer, causing water loss and dehydration</td>
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</tr>
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<tr>
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<td>10</td>
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<td>Nicotinoid-pyrethroid combinations</td>
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<td></td>
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<td>j) Stimulates acetylcholine receptors and sodium channels simultaneously (potentiation)</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td>k) Disrupts mitochondrial respiration, depleting cellular energy</td>
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</tr>
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<tr>
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<td></td>
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<td></td>
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<td></td>
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<td>l) Blocks acetylcholine receptors, preventing nerve signal transmission</td>
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</tr>
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</tbody>
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</table>
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<p><strong>Answer Key:</strong>
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1 → c, 2 → a, 3 → e, 4 → f, 5 → b, 6 → g, 7 → d, 8 → h, 9 → i, 10 → j</p>
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<p><strong>Notes:</strong>
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- This exercise tests understanding of both the target site AND the specific mode of action (stimulation vs. blockage vs. inhibition) — the core teaching framework of the presentation.
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- Distractors: (k) mitochondrial disruption is discussed for products like hydramethylnon but is not paired with any Column A item; (l) is a plausible-sounding but incorrect mechanism not described in the presentation.</p>
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<p><strong>Source in transcript:</strong> Blocks 184–205 (four modes of action), 346–362 (sodium channels), 363–387 (chloride channels), 388–407 (acetylcholine), 408–420 (combinations), 429–444 (diamides), 466–482 (IGRs), 499–511 (dusts)</p>
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<hr />
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<h3 id="matching-exercise-3-practical-factors-affecting-insecticide-performance">Matching Exercise 3: Practical Factors Affecting Insecticide Performance<a class="headerlink" href="#matching-exercise-3-practical-factors-affecting-insecticide-performance" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 48:15 – 56:30 (practical factors section)
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<strong>Type:</strong> Timing-Practice Matching</p>
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<p><strong>Instructions:</strong> Match each practical factor or scenario in Column A with the correct explanation or outcome described by Dr. Scharf in Column B. Note: Column B contains two extra items.</p>
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<table>
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<thead>
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<tr>
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<th>#</th>
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<th>Column A</th>
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<th></th>
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<th>Column B</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>1</td>
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<td>Excess food in a cockroach account</td>
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<td></td>
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<td>a) Can pass insecticide through two digestive tracts and still affect a third individual</td>
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</tr>
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<tr>
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<td>2</td>
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<td>Dirt and grease on treated surfaces</td>
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<td></td>
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<td>b) Physically bind and tie up insecticides, reducing their effectiveness</td>
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</tr>
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<tr>
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<td>3</td>
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<td>Cockroach secondary/tertiary kill</td>
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<td></td>
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<td>c) Enables slow-acting insecticides to spread through food sharing and grooming</td>
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</tr>
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<tr>
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<td>4</td>
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<td>Trophallaxis and allogrooming in social insects</td>
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<td></td>
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<td>d) Competes directly with bait placements, reducing consumption by target pests</td>
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</tr>
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<tr>
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<td>5</td>
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<td>Flea larvae exposed through adult flea feces</td>
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<td></td>
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<td>e) Causes the insecticide's active ingredient to degrade faster in the environment</td>
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</tr>
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<tr>
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||||
<td>6</td>
|
||||
<td>UV light exposure on raw insecticides</td>
|
||||
<td></td>
|
||||
<td>f) Larvae consume insecticide-laden feces of treated adults as a nutritional source</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>7</td>
|
||||
<td>Formulations (inerts, stabilizers, attractants)</td>
|
||||
<td></td>
|
||||
<td>g) Enhance stability, extend longevity, improve safety, and keep active ingredients dissolved in water</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>8</td>
|
||||
<td>Product rotation every 3 months or monthly</td>
|
||||
<td></td>
|
||||
<td>h) Helps manage resistance by alternating between different modes of action</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td></td>
|
||||
<td></td>
|
||||
<td></td>
|
||||
<td>i) Increases the LD50 of the product, making it less toxic to target pests</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td></td>
|
||||
<td></td>
|
||||
<td></td>
|
||||
<td>j) Converts neurotoxic insecticides into non-repellent formulations</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><strong>Answer Key:</strong>
|
||||
1 → d, 2 → b, 3 → a, 4 → c, 5 → f, 6 → e, 7 → g, 8 → h</p>
|
||||
<p><strong>Notes:</strong>
|
||||
- This exercise bridges the gap between toxicology and practice — the section of the presentation Scharf described as "where toxicology interfaces with practice."
|
||||
- Distractors: (i) is plausible-sounding but reverses the relationship (formulations don't increase LD50 for targets); (j) is a fabricated mechanism not described in the presentation.</p>
|
||||
<p><strong>Source in transcript:</strong> Blocks 515–547 (stability and formulations), 548–567 (pest behavior), 568–585 (sanitation), 586–611 (resistance management)</p>
|
||||
<hr />
|
||||
<h2 id="moodle-activity-verification">Moodle Activity Verification<a class="headerlink" href="#moodle-activity-verification" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li>[x] All terms, definitions, and relationships derived from presentation content</li>
|
||||
<li>[x] Timestamp references verified against corrected SRT</li>
|
||||
<li>[x] No external knowledge required to answer correctly</li>
|
||||
<li>[x] Matching items unambiguous based on presentation content</li>
|
||||
<li>[x] 1–2 plausible distractors included per exercise to prevent elimination guessing</li>
|
||||
<li>[x] Answer keys unambiguously correct per speaker's content</li>
|
||||
<li>[x] Exercises cover early (target sites), middle (modes of action and effects), and late (practical factors) presentation content</li>
|
||||
</ul>
|
||||
|
||||
|
||||
|
||||
|
||||
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|
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|
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|
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Principles of Insecticide Mode of Action — Dr. Michael Scharf
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Principles of Insecticide Mode of Action — Dr. Michael Scharf
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|
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|
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|
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@@ -4183,12 +4636,212 @@
|
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||||
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||||
|
||||
<h1 id="moodle-quiz-scharf-insecticide-moa">Moodle Quiz — Scharf, Insecticide MOA<a class="headerlink" href="#moodle-quiz-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 4 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="gtbop-moodle-quiz">GTBOP Moodle Quiz<a class="headerlink" href="#gtbop-moodle-quiz" title="Permanent link">¶</a></h1>
|
||||
<h2 id="principles-of-insecticide-mode-of-action-dr-michael-scharf">Principles of Insecticide Mode of Action — Dr. Michael Scharf<a class="headerlink" href="#principles-of-insecticide-mode-of-action-dr-michael-scharf" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Webinar Date:</strong> October 18, 2017
|
||||
<strong>Series:</strong> Structural Pest Control
|
||||
<strong>Activity Type:</strong> Multiple Choice Quiz
|
||||
<strong>Questions:</strong> 15
|
||||
<strong>Difficulty Distribution:</strong> 6 Recall (40%) / 6 Application (40%) / 3 Analysis (20%)</p>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<h3 id="chain-of-custody">CHAIN OF CUSTODY<a class="headerlink" href="#chain-of-custody" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li><strong>Source documents:</strong> Corrected SRT (GTBOP_Transcript_2017-10-18_InsecticideMOA.srt) + Archive Package (GTBOP_Archive_Summary_2017-10-18_InsecticideMOA.md)</li>
|
||||
<li><strong>All questions and answers derived exclusively from presentation content</strong></li>
|
||||
<li><strong>No external knowledge required to answer correctly</strong></li>
|
||||
</ul>
|
||||
<hr />
|
||||
<h3 id="question-1">Question 1<a class="headerlink" href="#question-1" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 17:51 – 19:30
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>According to Dr. Scharf, how many basic modes of action do all insecticides fall into?</p>
|
||||
<p>a) Two
|
||||
b) Four
|
||||
c) Six
|
||||
d) Nine</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf states there are only four basic modes of action: stimulation, blockage, modulation, and inhibition. He emphasizes that all insecticide effects on target sites can be categorized into one of these four mechanisms.
|
||||
<strong>Source in transcript:</strong> ~18:07 — "We can really break it down into four modes of action. There are only four kinds that occur."</p>
|
||||
<hr />
|
||||
<h3 id="question-2">Question 2<a class="headerlink" href="#question-2" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 32:24 – 34:07
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>Which insecticide class targets axonal sodium channels by stimulating them, causing rapid knockdown and excitation in insects?</p>
|
||||
<p>a) Phenylpyrazoles
|
||||
b) Diamides
|
||||
c) Pyrethroids
|
||||
d) Organophosphates</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Scharf explains that pyrethroids (along with DDT and pyrethrins) stimulate sodium channels on the nerve axon, causing excitation and the rapid knockdown commonly observed when insects are treated with pyrethrins.
|
||||
<strong>Source in transcript:</strong> ~32:56 — "We have pyrethroids and also DDT and pyrethrins... They stimulate sodium channels and cause excitation."</p>
|
||||
<hr />
|
||||
<h3 id="question-3">Question 3<a class="headerlink" href="#question-3" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 34:12 – 36:16
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A technician applies fipronil to a cockroach harborage area and observes insects exhibiting hyperexcitation rather than paralysis. Based on Dr. Scharf's explanation of fipronil's mode of action, why does fipronil cause excitation rather than sedation?</p>
|
||||
<p>a) Fipronil stimulates sodium channels, causing nerves to fire rapidly
|
||||
b) Fipronil blocks chloride channels, removing the calming effect of chloride on neurons
|
||||
c) Fipronil inhibits acetylcholinesterase, causing neurotransmitter buildup
|
||||
d) Fipronil stimulates muscular calcium channels, causing uncontrolled contraction</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf explains that chloride normally has a "mellowing" effect on neurons. Fipronil blocks the chloride channel, removing that calming influence, which leads to excitation. He demonstrated this with nerve recordings showing increased firing rate after fipronil application.
|
||||
<strong>Source in transcript:</strong> ~34:48 — "Fipronil blocks the chloride channel so you're blocking this mellowing effect which leads to excitation."</p>
|
||||
<hr />
|
||||
<h3 id="question-4">Question 4<a class="headerlink" href="#question-4" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 33:22 – 34:10
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A pest management professional encounters a situation where rapid knockdown is undesirable and instead needs an insecticide that paralyzes insects by blocking nervous system function. Which sodium channel insecticide would best fit this need, based on the presentation?</p>
|
||||
<p>a) Bifenthrin
|
||||
b) Indoxacarb
|
||||
c) Fipronil
|
||||
d) Imidacloprid</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf explains that indoxacarb (an oxadiazine) blocks sodium channels rather than stimulating them, causing the "on switch" to be stuck in the off position, which paralyzes the insect. This contrasts with pyrethroids like bifenthrin, which stimulate sodium channels and cause excitation.
|
||||
<strong>Source in transcript:</strong> ~33:34 — "Indoxacarb affects the sodium channel but it blocks it... the insect is actually paralyzed because its sodium channels don't work."</p>
|
||||
<hr />
|
||||
<h3 id="question-5">Question 5<a class="headerlink" href="#question-5" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 40:02 – 41:40
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>What is unique about the mammalian safety profile of diamide insecticides such as chlorantraniliprole?</p>
|
||||
<p>a) They require a "Danger" signal word due to moderate toxicity
|
||||
b) Their mammalian toxicity is so low that the EPA initially did not require a signal word
|
||||
c) They are equally toxic to mammals and insects
|
||||
d) They are safe only when applied as baits, not as sprays</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf states that diamides are so safe for mammals that the EPA initially required no signal word. Manufacturers voluntarily adopted a "caution" label. He still emphasized that safety guidelines should be followed.
|
||||
<strong>Source in transcript:</strong> ~41:04 — "These products are actually so safe for mammals that no signal words were required by the EPA initially."</p>
|
||||
<hr />
|
||||
<h3 id="question-6">Question 6<a class="headerlink" href="#question-6" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 40:02 – 41:03
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>According to Dr. Scharf, what happens physiologically when a diamide insecticide like chlorantraniliprole affects an insect?</p>
|
||||
<p>a) It blocks sodium channels, preventing nerve impulses
|
||||
b) It inhibits chitin synthesis during molting
|
||||
c) It stimulates muscular calcium channels, causing contraction followed by energy depletion and paralysis
|
||||
d) It disrupts the insect's respiratory chain in the mitochondria</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Scharf explains that diamides stimulate neuromuscular calcium channels, causing muscles to contract for hours until the insect's energy is burned up, after which it enters a paralyzed state for days until it dies.
|
||||
<strong>Source in transcript:</strong> ~40:48 — "What these things do is they stimulate the neuromuscular calcium channel and that causes that muscle to contract for a few hours and then it burns up all its energy."</p>
|
||||
<hr />
|
||||
<h3 id="question-7">Question 7<a class="headerlink" href="#question-7" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 36:20 – 38:01
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>Which of the following target sites do nicotinoid insecticides affect?</p>
|
||||
<p>a) Sodium channels on the nerve axon
|
||||
b) Chloride channels on neurons
|
||||
c) Acetylcholine receptors at the synapse
|
||||
d) Muscular calcium channels</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Scharf identifies nicotinoids as affecting the acetylcholine receptor by stimulating it and causing excitation in the insect. He also notes that sulfoximines and spinosyns share this same target site.
|
||||
<strong>Source in transcript:</strong> ~36:54 — "We have our mainly the nicotinoids... They're affecting the acetylcholine receptor by stimulating it."</p>
|
||||
<hr />
|
||||
<h3 id="question-8">Question 8<a class="headerlink" href="#question-8" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 37:28 – 38:01
|
||||
<strong>Difficulty:</strong> Analysis</p>
|
||||
<p>Dr. Scharf notes that organophosphates and carbamates are subject to more regulatory restrictions than many newer insecticide classes. Based on his explanation, what is the underlying reason for these restrictions?</p>
|
||||
<p>a) They are more expensive to manufacture than newer products
|
||||
b) Their target site (acetylcholinesterase) is not insect-specific, so they are equally effective against mammals
|
||||
c) They cause environmental persistence that exceeds all other insecticide classes
|
||||
d) They are only effective against a narrow range of pest species</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf explicitly states that the acetylcholinesterase target site is "not a really insect specific target site" and that "these things work equally well against humans and mammals," which is the reason for restrictions on these product classes.
|
||||
<strong>Source in transcript:</strong> ~37:53 — "This is not a really insect specific target site. You know these things work equally well against humans and mammals and so we have a lot of restrictions."</p>
|
||||
<hr />
|
||||
<h3 id="question-9">Question 9<a class="headerlink" href="#question-9" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 38:04 – 39:05
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A combination product pairs a nicotinoid with a pyrethroid. Based on Dr. Scharf's presentation, what advantage does this combination provide over a single active ingredient?</p>
|
||||
<p>a) The two ingredients target the same site for a doubled dose effect
|
||||
b) The combination eliminates the need for product rotation
|
||||
c) Hitting two different target sites simultaneously produces a potentiation effect — synergy greater than either alone
|
||||
d) The pyrethroid component makes the product non-repellent</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Scharf explains that combination products produce potentiation by hitting two target sites at once — the nicotinoid targets the acetylcholine receptor while the pyrethroid targets sodium channels — creating a "one plus one equals three" synergistic effect.
|
||||
<strong>Source in transcript:</strong> ~38:35 — "They cause this effect called potentiation, which is actually hitting two target sites at once. So you get this synergy, this one plus one equals three kind of effect."</p>
|
||||
<hr />
|
||||
<h3 id="question-10">Question 10<a class="headerlink" href="#question-10" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 51:02 – 53:01
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A pest control operator is treating a heavy German cockroach infestation with gel bait. Based on Dr. Scharf's discussion of pest behavior, why might the actual number of cockroaches killed exceed the number that directly consumed the bait?</p>
|
||||
<p>a) Gel bait releases a fumigant vapor that kills nearby cockroaches
|
||||
b) Cockroaches that eat bait excrete insecticide in their feces, which other cockroaches consume, producing secondary and even tertiary kill
|
||||
c) The bait becomes more concentrated as it dries, increasing its toxicity over time
|
||||
d) Cockroaches are attracted to the pheromones of dead individuals, bringing them into contact with remaining bait</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf describes secondary and tertiary kill in cockroaches: one cockroach eats bait, excretes insecticide, and other cockroaches consume the feces. He notes research showing the toxin can pass through two digestive tracts and still affect a third cockroach.
|
||||
<strong>Source in transcript:</strong> ~51:24 — "If we have a cockroach that eats a bait and it either excretes, you know, some of the bait in its excrement... We can have secondary kill and even tertiary kill."</p>
|
||||
<hr />
|
||||
<h3 id="question-11">Question 11<a class="headerlink" href="#question-11" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 54:19 – 56:28
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>What rotation frequency does Dr. Scharf recommend for switching active ingredients in cockroach management to help manage resistance?</p>
|
||||
<p>a) Every week
|
||||
b) Every month or every three months
|
||||
c) Every six months
|
||||
d) Annually</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf recommends switching active ingredients every three months, or even every month if possible, as part of a resistance management rotation strategy for cockroach accounts.
|
||||
<strong>Source in transcript:</strong> ~55:49 — "Every three months switch active ingredients, maybe even every month if you can do it."</p>
|
||||
<hr />
|
||||
<h3 id="question-12">Question 12<a class="headerlink" href="#question-12" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 53:04 – 54:11
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A technician is having difficulty achieving control with gel bait in a commercial kitchen. The kitchen has grease buildup on surfaces and abundant food debris. Based on Dr. Scharf's discussion, what is the most likely reason for reduced bait performance?</p>
|
||||
<p>a) The bait has developed resistance to the cockroach population
|
||||
b) Grease and dirt tie up insecticides on surfaces, and excess food competes directly with bait for cockroach feeding
|
||||
c) The kitchen's humidity is degrading the active ingredient
|
||||
d) The bait formulation is incompatible with commercial kitchen environments</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf specifically identifies three sanitation-related factors that reduce insecticide efficacy: excess food competing with bait, clutter creating untreatable harborage, and dirt and grease that physically bind insecticides. He frames sanitation as essential to making insecticides more effective.
|
||||
<strong>Source in transcript:</strong> ~53:31 — "Excess food in an account will compete with bait" and ~54:02 — "dirt and grease tie up insecticides too."</p>
|
||||
<hr />
|
||||
<h3 id="question-13">Question 13<a class="headerlink" href="#question-13" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 41:42 – 44:46
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A technician inspects a cockroach account and notices several German cockroaches with twisted, malformed wings. Based on the presentation, what does this observation most likely indicate?</p>
|
||||
<p>a) The cockroaches are infected with a fungal pathogen
|
||||
b) The population has been exposed to insect growth regulators, specifically juvenile hormone analogs
|
||||
c) The cockroaches have developed pyrethroid resistance
|
||||
d) The cockroaches are immature nymphs that have not yet completed development</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf specifically identifies wing twist as a diagnostic sign that IGRs (particularly juvenile hormone analogs like pyriproxyfen) are active in a cockroach population. He advises that when wing twist is visible, it may be appropriate to rotate to a different product class.
|
||||
<strong>Source in transcript:</strong> ~44:25 — "If you go into a new account and you see individuals with wing twist... you can put good money down on the fact that IGRs are in that population affecting it."</p>
|
||||
<hr />
|
||||
<h3 id="question-14">Question 14<a class="headerlink" href="#question-14" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 19:41 – 22:40
|
||||
<strong>Difficulty:</strong> Analysis</p>
|
||||
<p>Dr. Scharf states that the relationship between LD50 and product toxicity is inverse. A professional is comparing two insecticides: Product A has an LD50 of 5 mg/kg for cockroaches, and Product B has an LD50 of 500 mg/kg for cockroaches. Which product is more toxic to cockroaches, and why?</p>
|
||||
<p>a) Product B, because a higher LD50 means more insecticide reaches the target site
|
||||
b) Product A, because a smaller LD50 means a smaller dose is needed to kill 50% of the test population
|
||||
c) Both are equally toxic; LD50 only measures speed of action
|
||||
d) Product B, because a higher LD50 indicates greater potency</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Scharf explains that LD50 is the lethal dose required to kill 50% of a test population, and the relationship to toxicity is inverse — the smaller the LD50, the higher the toxicity, because less product is needed to achieve the lethal effect.
|
||||
<strong>Source in transcript:</strong> ~20:24 — "The smaller the LD50, the higher the toxicity of a product. That means... you only need a small dose to kill half of your test population."</p>
|
||||
<hr />
|
||||
<h3 id="question-15">Question 15<a class="headerlink" href="#question-15" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 46:56 – 48:09 and 04:01 – 04:00 (pollinator context)
|
||||
<strong>Difficulty:</strong> Analysis</p>
|
||||
<p>Dr. Scharf discusses cuticle dehydrating dusts like diatomaceous earth and silica gel. Considering his earlier discussion of insect physiology, why are these products effective against insects but pose minimal chemical toxicity risk to mammals?</p>
|
||||
<p>a) They work through a physical mechanism — abrading the waxy cuticle layer and causing water loss — rather than through a biochemical target site interaction
|
||||
b) They contain active ingredients that are specific to insect nervous systems
|
||||
c) They are formulated with attractants that only insects will consume
|
||||
d) They degrade too quickly in the environment to affect mammals</p>
|
||||
<p><strong>Correct Answer:</strong> a
|
||||
<strong>Explanation:</strong> Scharf explains that silica gel and diatomaceous earth are essentially finely ground glass powder that abrades the protective waxy outer layer of the insect cuticle, leading to water loss and death. This is a physical mechanism rather than a chemical mode of action targeting a specific biochemical pathway, which is why these products do not pose the same chemical toxicity concerns for mammals.
|
||||
<strong>Source in transcript:</strong> ~47:00 — "We have silica gel and diatomaceous earth which are just basically finely ground glass powder... they abrade the cuticle, they break it down, which leads to water loss."</p>
|
||||
<hr />
|
||||
<h2 id="moodle-activity-verification">Moodle Activity Verification<a class="headerlink" href="#moodle-activity-verification" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li>[x] All 15 questions traceable to specific presentation segments</li>
|
||||
<li>[x] Timestamp references verified against corrected SRT</li>
|
||||
<li>[x] No external knowledge required to answer correctly</li>
|
||||
<li>[x] Difficulty distribution: 6 Recall / 6 Application / 3 Analysis</li>
|
||||
<li>[x] Answer keys unambiguously correct based on presentation content</li>
|
||||
<li>[x] Distractors plausible but definitively wrong per speaker's content</li>
|
||||
<li>[x] Questions drawn from early (Q1, Q2, Q14), middle (Q3–Q9, Q13), and late (Q10–Q12, Q15) presentation content</li>
|
||||
<li>[x] No "all of the above" or "none of the above" options used</li>
|
||||
</ul>
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -103,7 +103,7 @@
|
||||
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|
||||
|
||||
|
||||
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|
||||
<a href="#gtbop-webinar-archive-summary" class="md-skip">
|
||||
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|
||||
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|
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||||
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|
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|
||||
|
||||
|
||||
Archive Summary
|
||||
|
||||
|
||||
|
||||
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|
||||
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||||
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||||
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||||
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|
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Principles of Insecticide Mode of Action
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||||
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NARRATIVE SUMMARY
|
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YOUTUBE TIMESTAMPS
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|
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CHAIN OF CUSTODY
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|
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Principles of Insecticide Mode of Action
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<h1 id="archive-summary-scharf-insecticide-moa">Archive Summary — Scharf, Insecticide MOA<a class="headerlink" href="#archive-summary-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 2 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="gtbop-webinar-archive-summary">GTBOP Webinar Archive Summary<a class="headerlink" href="#gtbop-webinar-archive-summary" title="Permanent link">¶</a></h1>
|
||||
<h2 id="principles-of-insecticide-mode-of-action">Principles of Insecticide Mode of Action<a class="headerlink" href="#principles-of-insecticide-mode-of-action" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Webinar Date:</strong> October 18, 2017
|
||||
<strong>Speaker:</strong> Dr. Michael Scharf, O.W. Rawlins Orkin Endowed Chair in Urban Entomology and Molecular Physiology, Department of Entomology, Purdue University
|
||||
<strong>Moderator:</strong> Dr. Dan Suiter, Extension Entomologist, University of Georgia
|
||||
<strong>Duration:</strong> 1:07:06
|
||||
<strong>Series:</strong> Structural Pest Control
|
||||
<strong>CEU Categories:</strong> GA — 2 HPC (Cat 35: Industrial, Institutional, Structural and Health Related)</p>
|
||||
<hr />
|
||||
<h2 id="narrative-summary">NARRATIVE SUMMARY<a class="headerlink" href="#narrative-summary" title="Permanent link">¶</a></h2>
|
||||
<p>Dr. Michael Scharf of Purdue University presented a comprehensive overview of insecticide classification and mode of action designed to strengthen pest management professionals' understanding of how their chemical tools work. Scharf framed the practical importance of this knowledge around six themes: applicator and customer safety, accurate interpretation of trade literature, pollinator protection, resistance management, product sustainability, and the ability to design customized applications through situational pest management.</p>
|
||||
<p>Scharf began with a condensed review of insect physiology, covering the five systems most relevant to insecticide activity: the nervous system, the cuticle, the digestive tract, the tracheal system, and the musculature. He explained that insecticides interact with specific protein target sites through a key-and-lock relationship, and that all insecticide effects can be reduced to just four modes of action — stimulation, blockage, modulation, and inhibition. He introduced the LD50 concept and emphasized that modern insecticides are dramatically more toxic to insects than to mammals, with some classes like the diamides carrying such low mammalian toxicity that the EPA initially required no signal word.</p>
|
||||
<p>The presentation then systematically covered five neurotoxic insecticide classifications: sodium channel agents (pyrethroids, indoxacarb, metaflumizone), chloride channel agents (fipronil, isoxazolines, abamectin), acetylcholine receptor agents (nicotinoids, sulfoximines, spinosyns), acetylcholinesterase inhibitors (organophosphates, carbamates), and combination products pairing nicotinoids with pyrethroids for potentiation effects. Scharf followed with four non-neurotoxic classifications: muscular calcium channel agents (diamides such as chlorantraniliprole and cyantraniliprole), insect growth regulators (juvenile hormone analogs like pyriproxyfen and chitin synthesis inhibitors), inhibitors of energy production (hydramethylnon, chlorfenapyr, sulfuryl fluoride, boric acid), and cuticle dehydrating dusts (silica gel, diatomaceous earth).</p>
|
||||
<p>Scharf concluded by discussing practical factors that affect insecticide performance, including formulation types, pest behavior that can amplify efficacy through secondary and tertiary kill, the role of sanitation in an IPM framework, and resistance management. He identified resistance as likely the number one cause of callbacks in cockroach accounts and recommended rotating active ingredients every three months or even monthly. A Q&A session moderated by Dr. Suiter addressed combination product resistance risks, the flow of new active ingredients to market, the IRAC classification system, the distinction between nicotinoids and neonicotinoids, oral versus dermal toxicity, repellent versus non-repellent insecticides, and the growing consumer demand for essential oil-based products.</p>
|
||||
<hr />
|
||||
<h2 id="youtube-timestamps">YOUTUBE TIMESTAMPS<a class="headerlink" href="#youtube-timestamps" title="Permanent link">¶</a></h2>
|
||||
<p>0:00 Introduction and Speaker Credentials
|
||||
1:45 Why Understanding Mode of Action Matters
|
||||
6:03 Presentation Outline
|
||||
7:13 Additional Resources — PCT Article and UGA Publication
|
||||
8:26 Insect Physiology Overview — Nervous System, Cuticle, Gut, Trachea, Muscles
|
||||
14:02 Insecticide Classification Basics — Chemical Structure
|
||||
16:01 Target Site and Mode of Action — Key and Lock Analogy
|
||||
17:51 Four Basic Modes of Action — Stimulation, Blockage, Modulation, Inhibition
|
||||
19:41 The LD50 Concept and Mammalian Safety
|
||||
22:46 Overview of Neurotoxic and Non-Neurotoxic Classifications
|
||||
23:36 The Insect Nervous System — Neurons, Synapses, Neurotransmitters
|
||||
26:45 Neurophysiology Demonstration — Fipronil and Nerve Excitation
|
||||
28:40 Nervous System Target Sites — Roadmap of Ion Channels and Receptors
|
||||
32:24 Sodium Channel Insecticides — Pyrethroids, Indoxacarb, Metaflumizone
|
||||
34:12 Chloride Channel Insecticides — Fipronil, Isoxazolines, Abamectin
|
||||
36:20 Acetylcholine Receptor Insecticides — Nicotinoids, Sulfoximines, Spinosyns
|
||||
37:28 Acetylcholinesterase Inhibitors — Organophosphates and Carbamates
|
||||
38:04 Combination Products — Nicotinoid-Pyrethroid Potentiation
|
||||
39:07 Non-Neurotoxic Insecticides Overview
|
||||
40:02 Muscular Calcium Channel Agents — Diamides
|
||||
41:42 Insect Growth Regulators — JH Analogs and Chitin Synthesis Inhibitors
|
||||
45:18 Inhibitors of Energy Production — Hydramethylnon, Chlorfenapyr, Fumigants
|
||||
46:56 Cuticle Dehydrating Dusts — Silica Gel and Diatomaceous Earth
|
||||
48:15 Factors Affecting Insecticide Efficacy
|
||||
48:46 Stability, Persistence, and Formulations
|
||||
51:02 Pest Behavior — Secondary and Tertiary Kill, Trophallaxis
|
||||
53:04 Sanitation and IPM
|
||||
54:19 Resistance Management — Rotation Strategies
|
||||
56:30 Summary Points
|
||||
57:44 Additional Resources
|
||||
57:53 Q&A — Combination Product Resistance
|
||||
59:53 Q&A — Flow of New Active Ingredients to Market
|
||||
1:01:08 Q&A — Chlorantraniliprole and Non-Target Invertebrates
|
||||
1:01:40 Q&A — IRAC Classification System
|
||||
1:02:38 Q&A — Nicotinoids vs. Neonicotinoids
|
||||
1:03:43 Q&A — Oral vs. Dermal Toxicity Routes
|
||||
1:04:43 Q&A — Repellent vs. Non-Repellent Insecticides
|
||||
1:05:32 Q&A — Essential Oils and 25B Exempt Products</p>
|
||||
<hr />
|
||||
<h2 id="questions-answers">QUESTIONS & ANSWERS<a class="headerlink" href="#questions-answers" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Q: What are the four basic modes of action that all insecticides fall into?</strong>
|
||||
A: According to Dr. Scharf, all insecticides disrupt target sites through one of just four mechanisms: stimulation (causing a target to fire more rapidly), blockage (shutting a target off), modulation (subtly changing the shape and function of a target, as pyrethroids do to sodium channels), and inhibition (preventing an enzyme from functioning, as organophosphates do to acetylcholinesterase). Understanding these four categories provides a framework for classifying any insecticide a professional might encounter.</p>
|
||||
<p><strong>Q: Why are diamide insecticides like chlorantraniliprole considered especially safe for mammals?</strong>
|
||||
A: Diamides target muscular calcium channels that are highly specific to insects. They stimulate these channels, causing uncontrolled muscle contraction that burns up the insect's energy and leads to paralysis and death over several days. Their mammalian toxicity is so low that the EPA initially did not require a signal word, though manufacturers voluntarily adopted a "caution" label. Despite this safety profile, Scharf emphasized that applicators should still follow all safety guidelines when using them.</p>
|
||||
<p><strong>Q: How does fipronil work at the neurological level?</strong>
|
||||
A: Fipronil is a phenylpyrazole that targets chloride channels in the insect nervous system. Under normal conditions, chloride channels allow negatively charged chloride ions into neurons, which has a calming or "mellowing" effect on nerve activity. Fipronil blocks these channels, removing that calming influence and causing excitation — the insect's nervous system essentially fires uncontrollably. Scharf demonstrated this visually using nerve recordings from dissected American cockroaches, showing a dramatic increase in firing rate and intensity after fipronil application.</p>
|
||||
<p><strong>Q: What is the difference between repellent and non-repellent insecticides?</strong>
|
||||
A: Scharf explained that the distinction largely comes down to pyrethroids versus everything else. Pyrethroids are highly detectable to insects — he compared them to "pepper spray" — making them strongly repellent. Most other active ingredients, including fipronil and nicotinoids, are not nearly as detectable, which is why they are classified as non-repellent. This distinction became particularly prominent when non-repellent termiticides entered the market approximately 15 years before this presentation.</p>
|
||||
<p><strong>Q: Why is resistance considered a major concern for cockroach management?</strong>
|
||||
A: Scharf identified resistance as likely the number one cause of callbacks in cockroach accounts. His research has documented cockroaches that can eat bait as their sole food source for a full month and survive. He noted that resistance is not limited to older chemistries — even combination products containing two active ingredients can face dual resistance when cockroach populations develop tolerance to both nicotinoids and pyrethroids simultaneously. He recommended rotating active ingredients every three months or even monthly to help manage resistance.</p>
|
||||
<p><strong>Q: How do pest behaviors like trophallaxis and secondary kill affect insecticide efficacy?</strong>
|
||||
A: Scharf described three examples of behavior-mediated insecticide transfer. In cockroaches, secondary and tertiary kill occurs when one cockroach eats bait, excretes the insecticide, and other cockroaches consume the feces — research has shown the toxin can pass through two digestive tracts and still affect a third cockroach. Flea larvae can be exposed when adult fleas treated by veterinary products defecate insecticide-laden feces that larvae consume as nutrition. Social insects like termites and ants spread insecticides through trophallaxis (food sharing from both mouth and anus) and allogrooming, which is why slow-acting insecticides are preferred for these pests.</p>
|
||||
<p><strong>Q: What role does sanitation play in insecticide effectiveness?</strong>
|
||||
A: Scharf emphasized that poor sanitation always makes insecticides less effective, regardless of how pest-specific modern products have become. Excess food in an account competes directly with bait placements, reducing consumption. Clutter creates untreatable harborage areas where pests can avoid contact with residual treatments. Dirt and grease on surfaces can physically bind and inactivate insecticides. He framed sanitation as a core component of the IPM mindset that directly enhances chemical efficacy.</p>
|
||||
<p><strong>Q: What is the IRAC and how can it help pest management professionals?</strong>
|
||||
A: IRAC stands for the Insecticide Resistance Action Committee, a global organization with representatives from all major insecticide manufacturers. IRAC develops mode of action classifications that help professionals understand which products share the same target sites. Their classification chart, updated once or twice a year, shows the full landscape of available active ingredients organized by mode of action. Professionals can use this resource to plan effective product rotations by ensuring they alternate between different mode of action groups rather than simply switching trade names.</p>
|
||||
<p><strong>Q: How do insect growth regulators work differently from neurotoxic insecticides?</strong>
|
||||
A: Unlike neurotoxins that target the nervous system for rapid effects, insect growth regulators disrupt the hormones and enzymes that control development and molting. Juvenile hormone analogs like pyriproxyfen mimic the insect's own juvenile hormone, leading to cuticle deformation and extra juvenile stages that cannot reproduce — causing the population to crash over time. Chitin synthesis inhibitors block the enzyme responsible for forming the exoskeleton during molting, leading to death during the molt or producing malformed cuticles that cause a characteristic "jackknife" effect in treated termites. Scharf noted that visible wing twist in cockroach populations is a reliable indicator that IGRs are already affecting that population.</p>
|
||||
<p><strong>Q: Why are insecticides generally more toxic through ingestion than through contact exposure?</strong>
|
||||
A: Scharf explained that both the insect cuticle and mammalian skin serve as highly effective barriers to insecticide penetration. The insect cuticle is a complex, multi-layered, waterproof structure that contact insecticides must traverse to reach internal target sites. In contrast, the gut lining is a much thinner layer of cells, allowing ingested insecticides to penetrate far more readily. The same principle applies to mammals — human skin is an exceptionally resistant barrier compared to the gut, which is why oral exposure routes are almost always more toxic than dermal exposure for any given active ingredient.</p>
|
||||
<p><strong>Q: What is the outlook for new active ingredients entering the urban pest management market?</strong>
|
||||
A: Scharf acknowledged that the flow of new active ingredients has slowed and the market has become heavily generic. While all major manufacturers maintain product pipelines, bringing a new active ingredient to market costs hundreds of millions to billions of dollars, and the economics must justify the investment. He noted that the urban pest management market represents a smaller slice of the overall pie compared to agriculture, which affects manufacturer incentives. Scharf encouraged the industry to advocate vocally to manufacturers about the need for new tools, particularly given growing resistance pressures.</p>
|
||||
<hr />
|
||||
<h2 id="additional-resources">ADDITIONAL RESOURCES<a class="headerlink" href="#additional-resources" title="Permanent link">¶</a></h2>
|
||||
<p><em>The following resources were referenced by the speaker during the presentation:</em></p>
|
||||
<ul>
|
||||
<li>Scharf, M.E. and D.L. Suiter. "Insecticide Primer and Insecticide Mode of Action." <em>PCT Magazine</em>, 2011.</li>
|
||||
<li>Scharf, M.E. and D.L. Suiter. <em>Insecticide Basics for the Pest Management Professional.</em> University of Georgia publication (available free of charge; URL referenced in presentation slides).</li>
|
||||
<li>IRAC (Insecticide Resistance Action Committee) — Mode of action classification chart, updated annually.</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<h2 id="chain-of-custody">CHAIN OF CUSTODY<a class="headerlink" href="#chain-of-custody" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li><strong>Source document:</strong> Corrected SRT from Stage 1 (GTBOP_Transcript_2017-10-18_InsecticideMOA.srt)</li>
|
||||
<li><strong>Source verified:</strong> 742 blocks, 2,968 lines, full read confirmed with coverage proof during Stage 1</li>
|
||||
<li><strong>Webinar date confirmed:</strong> Via original program announcement email from Tami Adams Boyle</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
|
||||
|
||||
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|
||||
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||||
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||||
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||||
File: Principles of Insecticide Mode of Action — Mike Scharf
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||||
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||||
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||||
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Chemical/Product Names
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
Technical Terms
|
||||
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||||
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||||
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|
||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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||||
Grammar
|
||||
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||||
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||||
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|
||||
|
||||
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||||
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||||
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||||
<span class="md-ellipsis">
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||||
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||||
Flagged for Verification
|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
||||
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||||
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Additional Speaker Confirmed for Roster
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||||
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Nicotinoid vs. Neonicotinoid Terminology
|
||||
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||||
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||||
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|
||||
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@@ -4183,12 +4560,122 @@
|
||||
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||||
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||||
|
||||
<h1 id="transcript-corrections-scharf-insecticide-moa">Transcript Corrections — Scharf, Insecticide MOA<a class="headerlink" href="#transcript-corrections-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 1 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="srt-transcript-correction-summary">SRT Transcript Correction Summary<a class="headerlink" href="#srt-transcript-correction-summary" title="Permanent link">¶</a></h1>
|
||||
<h2 id="file-principles-of-insecticide-mode-of-action-mike-scharf">File: Principles of Insecticide Mode of Action — Mike Scharf<a class="headerlink" href="#file-principles-of-insecticide-mode-of-action-mike-scharf" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Date Corrected:</strong> February 10, 2026
|
||||
<strong>Webinar Date:</strong> October 18, 2017
|
||||
<strong>Series:</strong> Structural Pest Control
|
||||
<strong>Topic:</strong> Entomology — Insecticide Classification and Mode of Action
|
||||
<strong>Speaker:</strong> Dr. Michael Scharf, O.W. Rawlins Orkin Endowed Chair in Urban Entomology and Molecular Physiology, Department of Entomology, Purdue University, West Lafayette, IN
|
||||
<strong>Moderator:</strong> Dr. Dan Suiter, Extension Entomologist, University of Georgia</p>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<h2 id="source-verification">SOURCE VERIFICATION<a class="headerlink" href="#source-verification" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li><strong>Original blocks:</strong> 742</li>
|
||||
<li><strong>Corrected blocks:</strong> 742 ✓ MATCH CONFIRMED</li>
|
||||
<li><strong>Time range:</strong> 00:00:00,020 to 01:07:06,220</li>
|
||||
<li><strong>Runtime:</strong> ~67 minutes</li>
|
||||
<li><strong>File reading:</strong> COMPLETE ✓</li>
|
||||
<li><strong>Coverage proof:</strong></li>
|
||||
<li>Early [~1:45]: Speaker states overarching goal to improve general knowledge of how insecticides work; discusses nervous system targeting vs. insect growth regulators</li>
|
||||
<li>Middle [~40:00]: Discusses muscular calcium channels and diamide insecticides (chlorantraniliprole, cyantraniliprole); notes EPA initially required no signal word due to low mammalian toxicity</li>
|
||||
<li>Late [~55:00]: Identifies resistance as probably the #1 cause of callbacks in cockroach accounts; cockroaches observed surviving on bait as sole food source for a month; recommends rotating active ingredients every 3 months or monthly</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<h2 id="corrections-applied">Corrections Applied<a class="headerlink" href="#corrections-applied" title="Permanent link">¶</a></h2>
|
||||
<h3 id="proper-nouns-speaker-names">Proper Nouns — Speaker Names<a class="headerlink" href="#proper-nouns-speaker-names" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"Dr. Sharf" → "Dr. Scharf" (Line 23)</li>
|
||||
<li>"Dan Suter" → "Dan Suiter" (Line 311)</li>
|
||||
<li>"Dave Oy" → "Dave Oi" (Line 2243) — Confirmed via webinar announcement: Dr. David Oi, USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, Gainesville, FL; presented "Fire Ants and Crazy Ants" in the same session</li>
|
||||
</ul>
|
||||
<h3 id="chemicalproduct-names">Chemical/Product Names<a class="headerlink" href="#chemicalproduct-names" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"chlorenterniliprol" → "chlorantraniliprole" (Line 559)</li>
|
||||
<li>"terniliprol" → "traniliprole" (Line 563 — continuation of "cyantraniliprole" split across blocks 140–141)</li>
|
||||
<li>"Metaflumazone" → "metaflumizone" (Line 1431)</li>
|
||||
<li>"Furilander and Sarlander" → "fluralaner and sarolaner" (Line 1499)</li>
|
||||
<li>"sulfoxyms or sulfoxifluor" → "sulfoximines or sulfoxaflor" (Line 1583)</li>
|
||||
<li>"spinosid" → "spinosad" (Line 1595)</li>
|
||||
<li>"chlorantraniliprol" → "chlorantraniliprole" (Line 1747)</li>
|
||||
<li>"cyan triniliprol" → "cyantraniliprole" (Line 1747)</li>
|
||||
<li>"pyroprosythin" → "pyriproxyfen" (Line 1883)</li>
|
||||
<li>"hydromethyl non" → "hydramethylnon" (Line 1951)</li>
|
||||
<li>"chlorphenipir" → "chlorfenapyr" (Line 1959)</li>
|
||||
<li>"sulfurofluoride" → "sulfuryl fluoride" (Line 1967)</li>
|
||||
<li>"disodium octoborate" → "disodium octaborate" (Line 1971)</li>
|
||||
<li>"chlorthenopyr" → "chlorfenapyr" (Line 2387)</li>
|
||||
<li>"chlorantrinoliprol" → "chlorantraniliprole" (Line 2691)</li>
|
||||
<li>"Amidocloprid" → "imidacloprid" (Line 2771)</li>
|
||||
</ul>
|
||||
<h3 id="technical-terms">Technical Terms<a class="headerlink" href="#technical-terms" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"semi-carbazone" → "semicarbazone" (Line 1435 — IRAC chemical subclass name)</li>
|
||||
<li>"spinosins" → "spinosyns" (Line 1347 — IRAC Group 5 class name)</li>
|
||||
<li>"aloe grooming" → "allogrooming" (Line 2247)</li>
|
||||
<li>"the nicotines target" → "the nicotinoids target" (Line 1663 — speaker consistently uses "nicotinoids" elsewhere; Whisper truncated the word)</li>
|
||||
<li>"Pubigants" → "Fumigants" (Line 1967)</li>
|
||||
<li>"acetylcholinesterase, which is a neurotransmitter" → "acetylcholine, which is a neurotransmitter" (Line 1287 — acetylcholinesterase is an enzyme, not a neurotransmitter; the speaker is clearly describing acetylcholine crossing the synapse to bind its receptor; Whisper appended "-esterase" to "acetylcholine")</li>
|
||||
</ul>
|
||||
<h3 id="grammar">Grammar<a class="headerlink" href="#grammar" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"Dr. Thank you very much Dan." → "Thank you very much, Dan." (Line 43 — "Dr." is a Whisper artifact from the end of the moderator's introduction bleeding into the speaker's first line; comma added after "Dan")</li>
|
||||
</ul>
|
||||
<h3 id="flagged-for-verification">Flagged for Verification<a class="headerlink" href="#flagged-for-verification" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>None remaining. Line 1207 ("need this acetylcholinesterase enzyme") was reviewed against audio and confirmed as accurate speech. Speaker is casually listing target sites from a slide; phrasing is informal but intelligible and left as-is per the principle of maintaining natural speech patterns.</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<h2 id="notes">Notes<a class="headerlink" href="#notes" title="Permanent link">¶</a></h2>
|
||||
<h3 id="speaker-not-in-reference-roster">Speaker Not in Reference Roster<a class="headerlink" href="#speaker-not-in-reference-roster" title="Permanent link">¶</a></h3>
|
||||
<p>Dr. Michael Scharf (Purdue University) is not currently listed in the GTBOP Common Speakers reference. Recommend adding:</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Name</th>
|
||||
<th>Affiliation</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>Dr. Michael Scharf</td>
|
||||
<td>Purdue University, Urban Entomology</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h3 id="additional-speaker-confirmed-for-roster">Additional Speaker Confirmed for Roster<a class="headerlink" href="#additional-speaker-confirmed-for-roster" title="Permanent link">¶</a></h3>
|
||||
<p>Dr. David Oi is confirmed via webinar announcement as a GTBOP presenter but is not currently in the Common Speakers reference. Recommend adding:</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Name</th>
|
||||
<th>Affiliation</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>Dr. David Oi</td>
|
||||
<td>USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, Gainesville, FL</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h3 id="nicotinoid-vs-neonicotinoid-terminology">Nicotinoid vs. Neonicotinoid Terminology<a class="headerlink" href="#nicotinoid-vs-neonicotinoid-terminology" title="Permanent link">¶</a></h3>
|
||||
<p>The speaker intentionally uses "nicotinoids" (not "neonicotinoids") throughout most of the presentation. In the Q&A section (~01:02:46), he and Dr. Suiter discuss the distinction: nicotinoids structurally resemble nicotine, while neonicotinoids have evolved further structurally but still target the acetylcholine receptor. This is the speaker's deliberate classification framework and has not been altered.</p>
|
||||
<h3 id="webinar-date-confirmation">Webinar Date Confirmation<a class="headerlink" href="#webinar-date-confirmation" title="Permanent link">¶</a></h3>
|
||||
<p>Date confirmed as October 18, 2017 via original program announcement email from Tami Adams Boyle. The event ran 7:00–10:00 AM EDT as part of the Structural Pest Control Webinar Series. Dr. Scharf's presentation "Principles of Insecticide Mode of Action" was paired with Dr. David Oi's "Fire Ants and Crazy Ants."</p>
|
||||
<hr />
|
||||
<h2 id="srt-format-compliance">SRT Format Compliance<a class="headerlink" href="#srt-format-compliance" title="Permanent link">¶</a></h2>
|
||||
<p>✅ All timestamps preserved exactly as original
|
||||
✅ All sequence numbers maintained (1–742)
|
||||
✅ Blank lines between segments preserved
|
||||
✅ Maximum 2 lines per subtitle segment maintained
|
||||
✅ No segments merged or split
|
||||
✅ Block count: 742 original = 742 corrected ✓
|
||||
✅ Line count: 2,968 original = 2,968 corrected ✓</p>
|
||||
<hr />
|
||||
<p><strong>Total Corrections:</strong> 24 individual corrections across 24 lines
|
||||
<strong>Flagged for Verification:</strong> 0 items (1 resolved via audio review)
|
||||
<strong>Processing:</strong> Complete file (742 subtitle blocks, 2,968 lines)</p>
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -26,7 +26,7 @@
|
||||
<meta name="generator" content="mkdocs-1.6.1, mkdocs-material-9.7.3">
|
||||
|
||||
|
||||
<title>GTBOP Webinar Archives — Dr. Michael Scharf — Principles of Insecticide Classification and Mode of Action</title>
|
||||
<title>GTBOP Webinar Archives — Insecticide Classification and Mode of Action</title>
|
||||
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|
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|
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|
||||
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|
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|
||||
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|
||||
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|
||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
|
||||
Dr. Michael Scharf — Principles of Insecticide Classification and Mode of Action
|
||||
Insecticide Classification and Mode of Action
|
||||
|
||||
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|
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|
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|
||||
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||||
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||||
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|
||||
<span class="md-ellipsis">
|
||||
|
||||
GTBOP Structural Pest Control — October 18, 2017
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
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|
||||
|
||||
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|
||||
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|
||||
<span class="md-ellipsis">
|
||||
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|
||||
</ul>
|
||||
</nav>
|
||||
|
||||
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|
||||
|
||||
<li class="md-nav__item">
|
||||
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|
||||
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|
||||
|
||||
Session Overview
|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
|
||||
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|
||||
@@ -4241,67 +4263,67 @@
|
||||
|
||||
|
||||
|
||||
<h1 id="dr-michael-scharf-principles-of-insecticide-classification-and-mode-of-action">Dr. Michael Scharf — Principles of Insecticide Classification and Mode of Action<a class="headerlink" href="#dr-michael-scharf-principles-of-insecticide-classification-and-mode-of-action" title="Permanent link">¶</a></h1>
|
||||
<p><strong>Webinar Date:</strong> October 18, 2017
|
||||
<strong>Speaker:</strong> Dr. Michael Scharf, Purdue University, Department of Entomology
|
||||
<strong>Moderator:</strong> Dr. Dan Suiter, Extension Entomologist, UGA
|
||||
<strong>Series:</strong> Structural Pest Control
|
||||
<strong>CEU Categories:</strong> Category 35 (Industrial, Institutional, Structural and Health Related)</p>
|
||||
<h1 id="insecticide-classification-and-mode-of-action">Insecticide Classification and Mode of Action<a class="headerlink" href="#insecticide-classification-and-mode-of-action" title="Permanent link">¶</a></h1>
|
||||
<h2 id="gtbop-structural-pest-control-october-18-2017">GTBOP Structural Pest Control — October 18, 2017<a class="headerlink" href="#gtbop-structural-pest-control-october-18-2017" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Speaker:</strong> Dr. Michael Scharf, O.W. Rawlins Orkin Endowed Chair in Urban Entomology and Molecular Physiology, Purdue University
|
||||
<strong>Moderator:</strong> Dr. Dan Suiter, Extension Entomologist, University of Georgia
|
||||
<strong>Duration:</strong> ~67 minutes (1:07:06)
|
||||
<strong>CEU Categories:</strong> Georgia Cat 35 (Industrial/Structural); multi-state credits in 8 states and 3 Canadian provinces</p>
|
||||
<hr />
|
||||
<h2 id="deliverables">Deliverables<a class="headerlink" href="#deliverables" title="Permanent link">¶</a></h2>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Deliverable</th>
|
||||
<th>Stage</th>
|
||||
<th>Description</th>
|
||||
<th>Deliverable</th>
|
||||
<th>Status</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><a href="archive-summary/">Archive Summary</a></td>
|
||||
<td>1</td>
|
||||
<td><a href="corrections/">Corrections Log</a></td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>2</td>
|
||||
<td>Narrative summary, YouTube timestamps, Q&A</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><a href="prose-transcript/">Prose Transcript</a></td>
|
||||
<td>5</td>
|
||||
<td>Full presentation in readable prose</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><a href="corrections/">Transcript Corrections</a></td>
|
||||
<td>1</td>
|
||||
<td>Correction log and verification</td>
|
||||
<td><a href="archive-summary/">Archive Summary</a></td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>3</td>
|
||||
<td><a href="platforms/youtube/">YouTube Version</a></td>
|
||||
<td>3</td>
|
||||
<td>Character-limited YouTube description</td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>3</td>
|
||||
<td><a href="platforms/website/">Website Version</a></td>
|
||||
<td>3</td>
|
||||
<td>Full web publication version</td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>3</td>
|
||||
<td><a href="platforms/ext-agent/">Extension Agent Version</a></td>
|
||||
<td>3</td>
|
||||
<td>CEU-focused asynchronous version</td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>4</td>
|
||||
<td><a href="activities/quiz/">Quiz</a></td>
|
||||
<td>4</td>
|
||||
<td>Multiple choice assessment</td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><a href="activities/matching/">Matching</a></td>
|
||||
<td>4</td>
|
||||
<td>Term-to-definition exercises</td>
|
||||
<td><a href="activities/matching/">Matching Exercises</a></td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>5</td>
|
||||
<td><a href="prose-transcript/">Prose Transcript</a></td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>—</td>
|
||||
<td><a href="downloads/">Corrected SRT</a></td>
|
||||
<td>1</td>
|
||||
<td>Download corrected subtitle file</td>
|
||||
<td>Complete</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
@@ -4329,7 +4351,12 @@
|
||||
</tbody>
|
||||
</table>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<h2 id="session-overview">Session Overview<a class="headerlink" href="#session-overview" title="Permanent link">¶</a></h2>
|
||||
<p>Dr. Michael Scharf of Purdue University presented a comprehensive overview of insecticide classification and mode of action designed to strengthen pest management professionals' understanding of how their chemical tools work. Scharf framed the practical importance of this knowledge around six themes: applicator and customer safety, accurate interpretation of trade literature, pollinator protection, resistance management, product sustainability, and the ability to design customized applications through situational pest management.</p>
|
||||
<p>The presentation systematically covered five neurotoxic insecticide classifications — sodium channel agents, chloride channel agents, acetylcholine receptor agents, acetylcholinesterase inhibitors, and combination products — followed by four non-neurotoxic classifications including diamides, insect growth regulators, inhibitors of energy production, and cuticle dehydrating dusts. Scharf concluded with practical factors affecting insecticide performance, resistance management strategies, and a Q&A session moderated by Dr. Suiter.</p>
|
||||
<hr />
|
||||
<p><em>Source: Corrected SRT — GTBOP_Transcript_2017-10-18_InsecticideMOA.srt</em>
|
||||
<em>Processed: 2026-03-17 | Pipeline v4.1</em></p>
|
||||
|
||||
|
||||
|
||||
|
||||
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|
||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
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||||
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||||
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|
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||||
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||||
Extension Agent
|
||||
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||||
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||||
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||||
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|
||||
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||||
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||||
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Principles of Insecticide Mode of Action
|
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|
||||
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|
||||
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|
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||||
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||||
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Viewing Instructions for Asynchronous Use
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||||
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|
||||
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||||
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||||
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||||
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|
||||
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|
||||
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||||
Key Takeaways for Extension Programming
|
||||
|
||||
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|
||||
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|
||||
|
||||
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||||
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||||
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||||
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||||
Video Chapter Guide
|
||||
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||||
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||||
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||||
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||||
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Additional Resources Referenced in Presentation
|
||||
|
||||
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|
||||
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||||
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||||
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||||
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|
||||
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Principles of Insecticide Mode of Action
|
||||
|
||||
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|
||||
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|
||||
|
||||
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||||
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||||
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||||
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CEU Credit Information
|
||||
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||||
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|
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Viewing Instructions for Asynchronous Use
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||||
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||||
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||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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|
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|
||||
|
||||
Key Takeaways for Extension Programming
|
||||
|
||||
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|
||||
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||||
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||||
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||||
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|
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Video Chapter Guide
|
||||
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||||
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|
||||
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||||
|
||||
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|
||||
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|
||||
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|
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|
||||
|
||||
Additional Resources Referenced in Presentation
|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
|
||||
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||||
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|
||||
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|
||||
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|
||||
</div>
|
||||
@@ -4183,12 +4416,168 @@
|
||||
|
||||
|
||||
|
||||
<h1 id="extension-agent-version-scharf-insecticide-moa">Extension Agent Version — Scharf, Insecticide MOA<a class="headerlink" href="#extension-agent-version-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 3 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="gtbop-webinar-archive-extension-agent-resource">GTBOP Webinar Archive — Extension Agent Resource<a class="headerlink" href="#gtbop-webinar-archive-extension-agent-resource" title="Permanent link">¶</a></h1>
|
||||
<h2 id="principles-of-insecticide-mode-of-action">Principles of Insecticide Mode of Action<a class="headerlink" href="#principles-of-insecticide-mode-of-action" title="Permanent link">¶</a></h2>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<h3 id="webinar-information">Webinar Information<a class="headerlink" href="#webinar-information" title="Permanent link">¶</a></h3>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Field</th>
|
||||
<th>Details</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><strong>Speaker</strong></td>
|
||||
<td>Dr. Michael Scharf, Purdue University</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Moderator</strong></td>
|
||||
<td>Dr. Dan Suiter, UGA Extension Entomologist</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Original Air Date</strong></td>
|
||||
<td>October 18, 2017</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Duration</strong></td>
|
||||
<td>1 hour, 7 minutes</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Series</strong></td>
|
||||
<td>Getting the Best of Pests — Structural Pest Control</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<hr />
|
||||
<h3 id="ceu-credit-information">CEU Credit Information<a class="headerlink" href="#ceu-credit-information" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Georgia Applicator Category:</strong>
|
||||
- <strong>Cat 35</strong> — Industrial, Institutional, Structural and Health Related: <strong>2 HPC</strong></p>
|
||||
<p><strong>Credit Eligibility:</strong> This archived presentation is suitable for asynchronous CEU delivery to licensed pest control operators holding Category 35 certification. Verify current CEU acceptance with the Georgia Department of Agriculture before scheduling.</p>
|
||||
<p><strong>Sign-in sheet and CEU documentation:</strong> Contact the UGA Center for Urban Agriculture or visit gabugs.uga.edu for current forms and procedures.</p>
|
||||
<hr />
|
||||
<h3 id="viewing-instructions-for-asynchronous-use">Viewing Instructions for Asynchronous Use<a class="headerlink" href="#viewing-instructions-for-asynchronous-use" title="Permanent link">¶</a></h3>
|
||||
<ol>
|
||||
<li>Total viewing time is approximately 1 hour and 7 minutes, including the Q&A session.</li>
|
||||
<li>Attendees must view the entire presentation to receive credit.</li>
|
||||
<li>The presentation includes a 57-minute lecture followed by a 10-minute moderated Q&A.</li>
|
||||
<li>A sign-in sheet must be completed and returned per standard GTBOP procedures.</li>
|
||||
</ol>
|
||||
<hr />
|
||||
<h3 id="content-summary">Content Summary<a class="headerlink" href="#content-summary" title="Permanent link">¶</a></h3>
|
||||
<p>Dr. Michael Scharf of Purdue University covers insecticide classification and mode of action at a level appropriate for licensed pest control professionals. The presentation provides foundational knowledge that supports informed product selection, resistance management, and customer communication.</p>
|
||||
<p><strong>Topics covered include:</strong> a review of insect physiology as it relates to insecticide activity (nervous system, cuticle, digestive tract, tracheal system, musculature); the four basic modes of action (stimulation, blockage, modulation, inhibition); the LD50 concept and mammalian safety; five neurotoxic insecticide classifications (sodium channel agents, chloride channel agents, acetylcholine receptor agents, acetylcholinesterase inhibitors, combination products); four non-neurotoxic classifications (diamides, insect growth regulators, energy production inhibitors, cuticle dehydrating dusts); and practical factors affecting insecticide performance including formulations, pest behavior, sanitation, and resistance management through product rotation.</p>
|
||||
<p><strong>The Q&A session addresses:</strong> combination product resistance, new active ingredient development, IRAC classifications, nicotinoid vs. neonicotinoid terminology, oral vs. dermal toxicity routes, repellent vs. non-repellent insecticides, and essential oil-based products.</p>
|
||||
<hr />
|
||||
<h3 id="key-takeaways-for-extension-programming">Key Takeaways for Extension Programming<a class="headerlink" href="#key-takeaways-for-extension-programming" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>All insecticides work through one of four basic mechanisms — a useful teaching framework for applicators at any experience level.</li>
|
||||
<li>Nine insecticide classifications (five neurotoxic, four non-neurotoxic) cover the full landscape of available tools.</li>
|
||||
<li>Diamides represent a notably safe chemistry class for mammals — EPA initially required no signal word.</li>
|
||||
<li>Resistance is identified as the probable #1 cause of callbacks in cockroach accounts; rotation every 3 months or monthly is recommended.</li>
|
||||
<li>The IRAC classification system is highlighted as a free, practical resource for planning product rotations by mode of action group.</li>
|
||||
<li>Sanitation and IPM practices are framed as direct enhancers of chemical efficacy, not just standalone strategies.</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<h3 id="video-chapter-guide">Video Chapter Guide<a class="headerlink" href="#video-chapter-guide" title="Permanent link">¶</a></h3>
|
||||
<p>For agents directing attendees to specific sections:</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Time</th>
|
||||
<th>Topic</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>0:00</td>
|
||||
<td>Introduction and Speaker Credentials</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>1:45</td>
|
||||
<td>Why Understanding Mode of Action Matters</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>8:26</td>
|
||||
<td>Insect Physiology Overview</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>14:02</td>
|
||||
<td>Insecticide Classification Basics</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>17:51</td>
|
||||
<td>Four Basic Modes of Action</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>19:41</td>
|
||||
<td>LD50 Concept and Mammalian Safety</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>22:46</td>
|
||||
<td>Neurotoxic Insecticide Classifications Begin</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>32:24</td>
|
||||
<td>Sodium Channel Insecticides</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>34:12</td>
|
||||
<td>Chloride Channel Insecticides</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>36:20</td>
|
||||
<td>Acetylcholine Receptor Insecticides</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>38:04</td>
|
||||
<td>Combination Products</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>39:07</td>
|
||||
<td>Non-Neurotoxic Insecticides Begin</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>40:02</td>
|
||||
<td>Diamides</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>41:42</td>
|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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<td>54:19</td>
|
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|
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<h3 id="additional-resources-referenced-in-presentation">Additional Resources Referenced in Presentation<a class="headerlink" href="#additional-resources-referenced-in-presentation" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>Scharf & Suiter, "Insecticide Primer and Insecticide Mode of Action," <em>PCT Magazine</em>, 2011</li>
|
||||
<li>Scharf & Suiter, <em>Insecticide Basics for the Pest Management Professional</em>, UGA publication (free)</li>
|
||||
<li>IRAC Mode of Action Classification Chart — irac-online.org</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<p><em>Getting the Best of Pests Webinar Series | University of Georgia Center for Urban Agriculture</em>
|
||||
<em>For questions about this archive or CEU procedures, contact the Center for Urban Agriculture.</em></p>
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<h1 id="website-version-scharf-insecticide-moa">Website Version — Scharf, Insecticide MOA<a class="headerlink" href="#website-version-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 3 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="principles-of-insecticide-mode-of-action">Principles of Insecticide Mode of Action<a class="headerlink" href="#principles-of-insecticide-mode-of-action" title="Permanent link">¶</a></h1>
|
||||
<h2 id="gtbop-structural-pest-control-webinar-series-archive">GTBOP Structural Pest Control Webinar Series — Archive<a class="headerlink" href="#gtbop-structural-pest-control-webinar-series-archive" title="Permanent link">¶</a></h2>
|
||||
<hr />
|
||||
<p><strong>Webinar Date:</strong> October 18, 2017
|
||||
<strong>Speaker:</strong> Dr. Michael Scharf, O.W. Rawlins Orkin Endowed Chair in Urban Entomology and Molecular Physiology, Department of Entomology, Purdue University
|
||||
<strong>Moderator:</strong> Dr. Dan Suiter, Extension Entomologist, University of Georgia
|
||||
<strong>Duration:</strong> 1:07:06
|
||||
<strong>Series:</strong> Getting the Best of Pests — Structural Pest Control Webinar Series
|
||||
<strong>CEU Credits:</strong> GA — 2 HPC (Cat 35: Industrial, Institutional, Structural and Health Related)</p>
|
||||
<hr />
|
||||
<h2 id="about-this-presentation">About This Presentation<a class="headerlink" href="#about-this-presentation" title="Permanent link">¶</a></h2>
|
||||
<p>Dr. Michael Scharf of Purdue University presented a comprehensive overview of insecticide classification and mode of action designed to strengthen pest management professionals' understanding of how their chemical tools work. Scharf framed the practical importance of this knowledge around six themes: applicator and customer safety, accurate interpretation of trade literature, pollinator protection, resistance management, product sustainability, and the ability to design customized applications through situational pest management.</p>
|
||||
<p>Scharf began with a condensed review of insect physiology, covering the five systems most relevant to insecticide activity: the nervous system, the cuticle, the digestive tract, the tracheal system, and the musculature. He explained that insecticides interact with specific protein target sites through a key-and-lock relationship, and that all insecticide effects can be reduced to just four modes of action — stimulation, blockage, modulation, and inhibition. He introduced the LD50 concept and emphasized that modern insecticides are dramatically more toxic to insects than to mammals, with some classes like the diamides carrying such low mammalian toxicity that the EPA initially required no signal word.</p>
|
||||
<p>The presentation then systematically covered five neurotoxic insecticide classifications: sodium channel agents (pyrethroids, indoxacarb, metaflumizone), chloride channel agents (fipronil, isoxazolines, abamectin), acetylcholine receptor agents (nicotinoids, sulfoximines, spinosyns), acetylcholinesterase inhibitors (organophosphates, carbamates), and combination products pairing nicotinoids with pyrethroids for potentiation effects. Scharf followed with four non-neurotoxic classifications: muscular calcium channel agents (diamides such as chlorantraniliprole and cyantraniliprole), insect growth regulators (juvenile hormone analogs like pyriproxyfen and chitin synthesis inhibitors), inhibitors of energy production (hydramethylnon, chlorfenapyr, sulfuryl fluoride, boric acid), and cuticle dehydrating dusts (silica gel, diatomaceous earth).</p>
|
||||
<p>Scharf concluded by discussing practical factors that affect insecticide performance, including formulation types, pest behavior that can amplify efficacy through secondary and tertiary kill, the role of sanitation in an IPM framework, and resistance management. He identified resistance as likely the number one cause of callbacks in cockroach accounts and recommended rotating active ingredients every three months or even monthly. A Q&A session moderated by Dr. Suiter addressed combination product resistance risks, the flow of new active ingredients to market, the IRAC classification system, the distinction between nicotinoids and neonicotinoids, oral versus dermal toxicity, repellent versus non-repellent insecticides, and the growing consumer demand for essential oil-based products.</p>
|
||||
<hr />
|
||||
<h2 id="video-chapters">Video Chapters<a class="headerlink" href="#video-chapters" title="Permanent link">¶</a></h2>
|
||||
<p>0:00 Introduction and Speaker Credentials
|
||||
1:45 Why Understanding Mode of Action Matters
|
||||
6:03 Presentation Outline
|
||||
7:13 Additional Resources — PCT Article and UGA Publication
|
||||
8:26 Insect Physiology Overview — Nervous System, Cuticle, Gut, Trachea, Muscles
|
||||
14:02 Insecticide Classification Basics — Chemical Structure
|
||||
16:01 Target Site and Mode of Action — Key and Lock Analogy
|
||||
17:51 Four Basic Modes of Action — Stimulation, Blockage, Modulation, Inhibition
|
||||
19:41 The LD50 Concept and Mammalian Safety
|
||||
22:46 Overview of Neurotoxic and Non-Neurotoxic Classifications
|
||||
23:36 The Insect Nervous System — Neurons, Synapses, Neurotransmitters
|
||||
26:45 Neurophysiology Demonstration — Fipronil and Nerve Excitation
|
||||
28:40 Nervous System Target Sites — Roadmap of Ion Channels and Receptors
|
||||
32:24 Sodium Channel Insecticides — Pyrethroids, Indoxacarb, Metaflumizone
|
||||
34:12 Chloride Channel Insecticides — Fipronil, Isoxazolines, Abamectin
|
||||
36:20 Acetylcholine Receptor Insecticides — Nicotinoids, Sulfoximines, Spinosyns
|
||||
37:28 Acetylcholinesterase Inhibitors — Organophosphates and Carbamates
|
||||
38:04 Combination Products — Nicotinoid-Pyrethroid Potentiation
|
||||
39:07 Non-Neurotoxic Insecticides Overview
|
||||
40:02 Muscular Calcium Channel Agents — Diamides
|
||||
41:42 Insect Growth Regulators — JH Analogs and Chitin Synthesis Inhibitors
|
||||
45:18 Inhibitors of Energy Production — Hydramethylnon, Chlorfenapyr, Fumigants
|
||||
46:56 Cuticle Dehydrating Dusts — Silica Gel and Diatomaceous Earth
|
||||
48:15 Factors Affecting Insecticide Efficacy
|
||||
48:46 Stability, Persistence, and Formulations
|
||||
51:02 Pest Behavior — Secondary and Tertiary Kill, Trophallaxis
|
||||
53:04 Sanitation and IPM
|
||||
54:19 Resistance Management — Rotation Strategies
|
||||
56:30 Summary Points
|
||||
57:44 Additional Resources
|
||||
57:53 Q&A — Combination Product Resistance
|
||||
59:53 Q&A — Flow of New Active Ingredients to Market
|
||||
1:01:08 Q&A — Chlorantraniliprole and Non-Target Invertebrates
|
||||
1:01:40 Q&A — IRAC Classification System
|
||||
1:02:38 Q&A — Nicotinoids vs. Neonicotinoids
|
||||
1:03:43 Q&A — Oral vs. Dermal Toxicity Routes
|
||||
1:04:43 Q&A — Repellent vs. Non-Repellent Insecticides
|
||||
1:05:32 Q&A — Essential Oils and 25B Exempt Products</p>
|
||||
<hr />
|
||||
<h2 id="questions-answers">Questions & Answers<a class="headerlink" href="#questions-answers" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Q: What are the four basic modes of action that all insecticides fall into?</strong>
|
||||
A: According to Dr. Scharf, all insecticides disrupt target sites through one of just four mechanisms: stimulation (causing a target to fire more rapidly), blockage (shutting a target off), modulation (subtly changing the shape and function of a target, as pyrethroids do to sodium channels), and inhibition (preventing an enzyme from functioning, as organophosphates do to acetylcholinesterase). Understanding these four categories provides a framework for classifying any insecticide a professional might encounter.</p>
|
||||
<p><strong>Q: Why are diamide insecticides like chlorantraniliprole considered especially safe for mammals?</strong>
|
||||
A: Diamides target muscular calcium channels that are highly specific to insects. They stimulate these channels, causing uncontrolled muscle contraction that burns up the insect's energy and leads to paralysis and death over several days. Their mammalian toxicity is so low that the EPA initially did not require a signal word, though manufacturers voluntarily adopted a "caution" label. Despite this safety profile, Scharf emphasized that applicators should still follow all safety guidelines when using them.</p>
|
||||
<p><strong>Q: How does fipronil work at the neurological level?</strong>
|
||||
A: Fipronil is a phenylpyrazole that targets chloride channels in the insect nervous system. Under normal conditions, chloride channels allow negatively charged chloride ions into neurons, which has a calming or "mellowing" effect on nerve activity. Fipronil blocks these channels, removing that calming influence and causing excitation — the insect's nervous system essentially fires uncontrollably. Scharf demonstrated this visually using nerve recordings from dissected American cockroaches, showing a dramatic increase in firing rate and intensity after fipronil application.</p>
|
||||
<p><strong>Q: What is the difference between repellent and non-repellent insecticides?</strong>
|
||||
A: Scharf explained that the distinction largely comes down to pyrethroids versus everything else. Pyrethroids are highly detectable to insects — he compared them to "pepper spray" — making them strongly repellent. Most other active ingredients, including fipronil and nicotinoids, are not nearly as detectable, which is why they are classified as non-repellent. This distinction became particularly prominent when non-repellent termiticides entered the market approximately 15 years before this presentation.</p>
|
||||
<p><strong>Q: Why is resistance considered a major concern for cockroach management?</strong>
|
||||
A: Scharf identified resistance as likely the number one cause of callbacks in cockroach accounts. His research has documented cockroaches that can eat bait as their sole food source for a full month and survive. He noted that resistance is not limited to older chemistries — even combination products containing two active ingredients can face dual resistance when cockroach populations develop tolerance to both nicotinoids and pyrethroids simultaneously. He recommended rotating active ingredients every three months or even monthly to help manage resistance.</p>
|
||||
<p><strong>Q: How do pest behaviors like trophallaxis and secondary kill affect insecticide efficacy?</strong>
|
||||
A: Scharf described three examples of behavior-mediated insecticide transfer. In cockroaches, secondary and tertiary kill occurs when one cockroach eats bait, excretes the insecticide, and other cockroaches consume the feces — research has shown the toxin can pass through two digestive tracts and still affect a third cockroach. Flea larvae can be exposed when adult fleas treated by veterinary products defecate insecticide-laden feces that larvae consume as nutrition. Social insects like termites and ants spread insecticides through trophallaxis (food sharing from both mouth and anus) and allogrooming, which is why slow-acting insecticides are preferred for these pests.</p>
|
||||
<p><strong>Q: What role does sanitation play in insecticide effectiveness?</strong>
|
||||
A: Scharf emphasized that poor sanitation always makes insecticides less effective, regardless of how pest-specific modern products have become. Excess food in an account competes directly with bait placements, reducing consumption. Clutter creates untreatable harborage areas where pests can avoid contact with residual treatments. Dirt and grease on surfaces can physically bind and inactivate insecticides. He framed sanitation as a core component of the IPM mindset that directly enhances chemical efficacy.</p>
|
||||
<p><strong>Q: What is the IRAC and how can it help pest management professionals?</strong>
|
||||
A: IRAC stands for the Insecticide Resistance Action Committee, a global organization with representatives from all major insecticide manufacturers. IRAC develops mode of action classifications that help professionals understand which products share the same target sites. Their classification chart, updated once or twice a year, shows the full landscape of available active ingredients organized by mode of action. Professionals can use this resource to plan effective product rotations by ensuring they alternate between different mode of action groups rather than simply switching trade names.</p>
|
||||
<p><strong>Q: How do insect growth regulators work differently from neurotoxic insecticides?</strong>
|
||||
A: Unlike neurotoxins that target the nervous system for rapid effects, insect growth regulators disrupt the hormones and enzymes that control development and molting. Juvenile hormone analogs like pyriproxyfen mimic the insect's own juvenile hormone, leading to cuticle deformation and extra juvenile stages that cannot reproduce — causing the population to crash over time. Chitin synthesis inhibitors block the enzyme responsible for forming the exoskeleton during molting, leading to death during the molt or producing malformed cuticles that cause a characteristic "jackknife" effect in treated termites. Scharf noted that visible wing twist in cockroach populations is a reliable indicator that IGRs are already affecting that population.</p>
|
||||
<p><strong>Q: Why are insecticides generally more toxic through ingestion than through contact exposure?</strong>
|
||||
A: Scharf explained that both the insect cuticle and mammalian skin serve as highly effective barriers to insecticide penetration. The insect cuticle is a complex, multi-layered, waterproof structure that contact insecticides must traverse to reach internal target sites. In contrast, the gut lining is a much thinner layer of cells, allowing ingested insecticides to penetrate far more readily. The same principle applies to mammals — human skin is an exceptionally resistant barrier compared to the gut, which is why oral exposure routes are almost always more toxic than dermal exposure for any given active ingredient.</p>
|
||||
<p><strong>Q: What is the outlook for new active ingredients entering the urban pest management market?</strong>
|
||||
A: Scharf acknowledged that the flow of new active ingredients has slowed and the market has become heavily generic. While all major manufacturers maintain product pipelines, bringing a new active ingredient to market costs hundreds of millions to billions of dollars, and the economics must justify the investment. He noted that the urban pest management market represents a smaller slice of the overall pie compared to agriculture, which affects manufacturer incentives. Scharf encouraged the industry to advocate vocally to manufacturers about the need for new tools, particularly given growing resistance pressures.</p>
|
||||
<hr />
|
||||
<h2 id="additional-resources">Additional Resources<a class="headerlink" href="#additional-resources" title="Permanent link">¶</a></h2>
|
||||
<p><em>The following resources were referenced by the speaker during the presentation:</em></p>
|
||||
<ul>
|
||||
<li>Scharf, M.E. and D.L. Suiter. "Insecticide Primer and Insecticide Mode of Action." <em>PCT Magazine</em>, 2011.</li>
|
||||
<li>Scharf, M.E. and D.L. Suiter. <em>Insecticide Basics for the Pest Management Professional.</em> University of Georgia publication (available free of charge; URL referenced in presentation slides).</li>
|
||||
<li>IRAC (Insecticide Resistance Action Committee) — Mode of action classification chart, updated annually. Visit <a href="https://irac-online.org">irac-online.org</a>.</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<p><em>This archive is part of the Getting the Best of Pests Webinar Series, hosted by the University of Georgia Center for Urban Agriculture. For more information about the GTBOP program, visit gabugs.uga.edu.</em></p>
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
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|
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|
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|
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<h1 id="youtube-description-scharf-insecticide-moa">YouTube Description — Scharf, Insecticide MOA<a class="headerlink" href="#youtube-description-scharf-insecticide-moa" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 3 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<p>Principles of Insecticide Mode of Action | Dr. Michael Scharf | GTBOP Structural Pest Control Webinar Series</p>
|
||||
<p>Dr. Michael Scharf of Purdue University presents a comprehensive overview of insecticide classification and mode of action for pest management professionals. Scharf covers insect physiology fundamentals, the key-and-lock relationship between insecticides and target sites, and nine insecticide classifications — five neurotoxic and four non-neurotoxic. The presentation concludes with practical factors affecting performance including formulations, pest behavior, sanitation, and resistance management. Q&A moderated by Dr. Dan Suiter.</p>
|
||||
<p>Presented: October 18, 2017
|
||||
Series: Getting the Best of Pests — Structural Pest Control Webinar Series
|
||||
Host: UGA Center for Urban Agriculture
|
||||
CEU Credits: GA — 2 HPC (Cat 35)</p>
|
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<p>TIMESTAMPS
|
||||
0:00 Introduction and Speaker Credentials
|
||||
1:45 Why Understanding Mode of Action Matters
|
||||
6:03 Presentation Outline
|
||||
7:13 Additional Resources — PCT Article and UGA Publication
|
||||
8:26 Insect Physiology Overview — Nervous System, Cuticle, Gut, Trachea, Muscles
|
||||
14:02 Insecticide Classification Basics — Chemical Structure
|
||||
16:01 Target Site and Mode of Action — Key and Lock Analogy
|
||||
17:51 Four Basic Modes of Action — Stimulation, Blockage, Modulation, Inhibition
|
||||
19:41 The LD50 Concept and Mammalian Safety
|
||||
22:46 Overview of Neurotoxic and Non-Neurotoxic Classifications
|
||||
23:36 The Insect Nervous System — Neurons, Synapses, Neurotransmitters
|
||||
26:45 Neurophysiology Demonstration — Fipronil and Nerve Excitation
|
||||
28:40 Nervous System Target Sites — Roadmap of Ion Channels and Receptors
|
||||
32:24 Sodium Channel Insecticides — Pyrethroids, Indoxacarb, Metaflumizone
|
||||
34:12 Chloride Channel Insecticides — Fipronil, Isoxazolines, Abamectin
|
||||
36:20 Acetylcholine Receptor Insecticides — Nicotinoids, Sulfoximines, Spinosyns
|
||||
37:28 Acetylcholinesterase Inhibitors — Organophosphates and Carbamates
|
||||
38:04 Combination Products — Nicotinoid-Pyrethroid Potentiation
|
||||
39:07 Non-Neurotoxic Insecticides Overview
|
||||
40:02 Muscular Calcium Channel Agents — Diamides
|
||||
41:42 Insect Growth Regulators — JH Analogs and Chitin Synthesis Inhibitors
|
||||
45:18 Inhibitors of Energy Production — Hydramethylnon, Chlorfenapyr, Fumigants
|
||||
46:56 Cuticle Dehydrating Dusts — Silica Gel and Diatomaceous Earth
|
||||
48:15 Factors Affecting Insecticide Efficacy
|
||||
48:46 Stability, Persistence, and Formulations
|
||||
51:02 Pest Behavior — Secondary and Tertiary Kill, Trophallaxis
|
||||
53:04 Sanitation and IPM
|
||||
54:19 Resistance Management — Rotation Strategies
|
||||
56:30 Summary Points
|
||||
57:44 Additional Resources
|
||||
57:53 Q&A — Combination Product Resistance
|
||||
59:53 Q&A — Flow of New Active Ingredients to Market
|
||||
1:01:08 Q&A — Chlorantraniliprole and Non-Target Invertebrates
|
||||
1:01:40 Q&A — IRAC Classification System
|
||||
1:02:38 Q&A — Nicotinoids vs. Neonicotinoids
|
||||
1:03:43 Q&A — Oral vs. Dermal Toxicity Routes
|
||||
1:04:43 Q&A — Repellent vs. Non-Repellent Insecticides
|
||||
1:05:32 Q&A — Essential Oils and 25B Exempt Products</p>
|
||||
<p>FREQUENTLY ASKED QUESTIONS</p>
|
||||
<p>Q: What are the four basic insecticide modes of action?
|
||||
A: All insecticides disrupt target sites through stimulation, blockage, modulation, or inhibition. Understanding these four mechanisms provides a framework for classifying any product a professional might encounter.</p>
|
||||
<p>Q: Why are diamide insecticides considered especially safe for mammals?
|
||||
A: Diamides target insect-specific muscular calcium channels. Their mammalian toxicity is so low that the EPA initially required no signal word, though manufacturers voluntarily adopted a "caution" label.</p>
|
||||
<p>Q: Why is resistance a major concern in cockroach management?
|
||||
A: Research has documented cockroaches surviving on bait as their sole food source for a month. Even combination products face dual resistance. Rotate active ingredients every three months or monthly.</p>
|
||||
<p>Q: How does the IRAC help pest management professionals?
|
||||
A: The Insecticide Resistance Action Committee classifies active ingredients by mode of action, helping professionals plan rotations between different target site groups rather than simply switching trade names.</p>
|
||||
<p>Q: What is the difference between repellent and non-repellent insecticides?
|
||||
A: The distinction largely comes down to pyrethroids versus everything else. Pyrethroids are highly detectable to insects — like "pepper spray" — while most other actives are not nearly as detectable.</p>
|
||||
<p>RESOURCES
|
||||
• Scharf & Suiter, "Insecticide Primer and Insecticide Mode of Action," PCT Magazine, 2011
|
||||
• Scharf & Suiter, "Insecticide Basics for the Pest Management Professional," UGA publication
|
||||
• IRAC Mode of Action Classification Chart: https://irac-online.org</p>
|
||||
<h1 id="pestmanagement-insecticides-modeofaction-ceu-structuralpestcontrol-ipm-uga-gtbop">PestManagement #Insecticides #ModeOfAction #CEU #StructuralPestControl #IPM #UGA #GTBOP<a class="headerlink" href="#pestmanagement-insecticides-modeofaction-ceu-structuralpestcontrol-ipm-uga-gtbop" title="Permanent link">¶</a></h1>
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