replaced Graziosi placeholders
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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Dr. Ignazio Graziosi — January 15, 2026
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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Dr. Ignazio Graziosi — January 15, 2026
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<h1 id="moodle-quiz-graziosi-tree-pests">Moodle Quiz — Graziosi, Tree Pests<a class="headerlink" href="#moodle-quiz-graziosi-tree-pests" 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-quiz">GTBOP Moodle Quiz<a class="headerlink" href="#gtbop-moodle-quiz" title="Permanent link">¶</a></h1>
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<h2 id="understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies">Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies<a class="headerlink" href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" title="Permanent link">¶</a></h2>
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<h3 id="dr-ignazio-graziosi-january-15-2026">Dr. Ignazio Graziosi — January 15, 2026<a class="headerlink" href="#dr-ignazio-graziosi-january-15-2026" title="Permanent link">¶</a></h3>
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<p><strong>Source:</strong> Corrected SRT transcript (Stage 1) + Archive Package (Stage 2)
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<strong>Questions:</strong> 15
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<strong>Difficulty Distribution:</strong> 6 Recall (40%) | 6 Application (40%) | 3 Analysis (20%)
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<strong>Coverage:</strong> Disease triangle/decline spiral (Q1–Q3), EAB (Q4–Q8), CMBS (Q9–Q12), Orange-striped oakworm (Q13–Q15)</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="question-1">Question 1<a class="headerlink" href="#question-1" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 1:28 – 2:32
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<strong>Difficulty:</strong> Recall</p>
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<p>According to Dr. Graziosi, the disease triangle describes the interaction of which three components that together cause tree damage?</p>
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<p>a) Pest, pathogen, and predator
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b) Pest, host tree, and environment
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c) Climate, soil, and genetics
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d) Insects, fungi, and nematodes</p>
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<p><strong>Correct Answer:</strong> b
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<strong>Explanation:</strong> Dr. Graziosi introduced the disease triangle as the interaction of the pest, the tree (host), and the environment, emphasizing that the pest alone is not sufficient to cause damage.
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<strong>Source in transcript:</strong> ~2:04–2:32, blocks 33–35</p>
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<h3 id="question-2">Question 2<a class="headerlink" href="#question-2" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 3:02 – 5:58
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<strong>Difficulty:</strong> Recall</p>
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<p>In the spiral of tree decline diagram, which of the following is classified as a predisposing factor?</p>
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<p>a) Defoliating insects
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b) Wood-boring insects
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c) Soil compaction
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d) Fungal pathogens</p>
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<p><strong>Correct Answer:</strong> c
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<strong>Explanation:</strong> Dr. Graziosi identified soil compaction as a predisposing factor in the outermost spiral, calling it "often the number one issue for many trees." Defoliating insects are inciting factors, and wood-boring insects and fungi are contributing factors.
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<strong>Source in transcript:</strong> ~4:08–4:31, blocks 49–52</p>
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<h3 id="question-3">Question 3<a class="headerlink" href="#question-3" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 5:04 – 6:06
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<strong>Difficulty:</strong> Analysis</p>
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<p>Dr. Graziosi explained that in the spiral of tree decline, each spiral level contains factors that can "cut through" directly to tree death. What is the practical significance of this for a tree care professional?</p>
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<p>a) Only contributing factors can kill a tree
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b) A single stressor from any level can be severe enough to kill a tree on its own, without the other factors
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c) Trees can only die when all three levels of stressors are present simultaneously
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d) Predisposing factors must always precede inciting factors before decline begins</p>
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<p><strong>Correct Answer:</strong> b
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<strong>Explanation:</strong> Dr. Graziosi specifically demonstrated that individual factors from any spiral level — for example, urban environment alone or soil compaction alone — can cut through the different layers and bring the tree directly to death, without requiring all other stressor levels to be present.
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<strong>Source in transcript:</strong> ~5:32–5:54, blocks 64–66</p>
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<h3 id="question-4">Question 4<a class="headerlink" href="#question-4" title="Permanent link">¶</a></h3>
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<p><strong>Timestamp Reference:</strong> 8:23 – 9:10
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<strong>Difficulty:</strong> Recall</p>
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<p>Which of the following is a key diagnostic sign that a tree is being attacked by the emerald ash borer?</p>
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<p>a) Sooty mold on branches
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b) Skeletonized leaves
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c) Water sprouts on the trunk
|
||||
d) Pink egg masses on bark</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi described water sprouts as "a very important diagnostic feature in order to understand if a tree is attacked by the emerald ash borer," noting they are the tree's desperate attempt to produce new growth in response to larval damage under the bark.
|
||||
<strong>Source in transcript:</strong> ~8:56–9:10, blocks 98–100</p>
|
||||
<hr />
|
||||
<h3 id="question-5">Question 5<a class="headerlink" href="#question-5" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 10:04 – 10:47
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>What is the characteristic shape of the exit hole left by an adult emerald ash borer emerging from a tree?</p>
|
||||
<p>a) Circular
|
||||
b) Oval
|
||||
c) D-shaped
|
||||
d) T-shaped</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi described the "very characteristic, the famous D-shaped exit hole" left when the adult beetle emerges from the tree.
|
||||
<strong>Source in transcript:</strong> ~10:11–10:15, block 110</p>
|
||||
<hr />
|
||||
<h3 id="question-6">Question 6<a class="headerlink" href="#question-6" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 10:48 – 11:42
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A landscape manager in southern Georgia discovers EAB in local ash trees and plans a treatment schedule based on a single annual emergence. Based on Dr. Graziosi's presentation, what important consideration might this manager be overlooking?</p>
|
||||
<p>a) EAB only emerges every two years in all locations
|
||||
b) A portion of the local EAB population may require two years to develop, meaning adults could emerge in both years
|
||||
c) EAB does not complete its life cycle in southern climates
|
||||
d) EAB only feeds on ash trees in northern states</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Dr. Graziosi explained that while EAB is mostly a one-generation-per-year insect, there is always a portion of the population that requires two years to develop. This is more pronounced at northern latitudes but occurs in any location, and it is important to know when planning control.
|
||||
<strong>Source in transcript:</strong> ~10:48–11:42, blocks 116–124</p>
|
||||
<hr />
|
||||
<h3 id="question-7">Question 7<a class="headerlink" href="#question-7" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 13:02 – 13:46
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>According to the presentation, what was the single most important factor responsible for the rapid spread of the emerald ash borer across North America?</p>
|
||||
<p>a) Natural flight dispersal
|
||||
b) Nursery stock trade
|
||||
c) Movement of infested firewood
|
||||
d) Wind currents carrying adult beetles</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi identified firewood as the primary culprit, explaining that campers and travelers moved infested firewood, and researchers were able to connect the pattern of EAB spread closely with the highway and freeway system.
|
||||
<strong>Source in transcript:</strong> ~13:00–13:46, blocks 136–141</p>
|
||||
<hr />
|
||||
<h3 id="question-8">Question 8<a class="headerlink" href="#question-8" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 15:26 – 16:44
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>An arborist inventorying trees in a Georgia neighborhood finds that all the ash trees have been killed by EAB but notices white fringetrees appear healthy. Based on Dr. Graziosi's presentation, should the arborist be concerned about EAB affecting the white fringetrees?</p>
|
||||
<p>a) No, because white fringetrees are not in the same plant family as ash
|
||||
b) No, because EAB only attacks ash species
|
||||
c) Yes, because white fringetree was discovered to be an alternate host for EAB and could serve as a population reservoir
|
||||
d) Yes, but only if the white fringetrees are under drought stress</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi explained that in 2014 it was discovered that EAB could expand its host range to attack white fringetree (same family, Oleaceae). More importantly, white fringetree can function as a reservoir for EAB populations even after all ash trees in an area are gone.
|
||||
<strong>Source in transcript:</strong> ~15:26–16:44, blocks 162–172</p>
|
||||
<hr />
|
||||
<h3 id="question-9">Question 9<a class="headerlink" href="#question-9" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 31:47 – 33:28
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A pest control operator inspects a crapemyrtle in December and finds both mature adult females and small mobile nymphs on the bark. Based on the presentation, is this finding unusual?</p>
|
||||
<p>a) Yes, all CMBS should be in a dormant stage during winter
|
||||
b) Yes, nymphs should only be present during summer months
|
||||
c) No, CMBS has overlapping generations, so multiple life stages can be present at any time of year
|
||||
d) No, but only adults should be present — the nymphs are likely a different insect</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi explained that CMBS can have up to five overlapping generations, meaning different stages of the insect can be found at any point. He showed a photo taken in Athens one month prior (winter) that contained both nymphs (crawlers) and adults.
|
||||
<strong>Source in transcript:</strong> ~33:10–33:47, blocks 327–329</p>
|
||||
<hr />
|
||||
<h3 id="question-10">Question 10<a class="headerlink" href="#question-10" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 36:42 – 37:17
|
||||
<strong>Difficulty:</strong> Analysis</p>
|
||||
<p>Dr. Graziosi discussed urban heat island effects in relation to crapemyrtle bark scale. Which of the following best explains why urban heat islands create a "double advantage" for scale insects?</p>
|
||||
<p>a) Heat kills natural enemies while attracting more scales to the area
|
||||
b) Heat increases tree growth rate, providing more food for scales
|
||||
c) Heat stresses the host tree, increasing its susceptibility, while simultaneously accelerating the insect's development
|
||||
d) Heat causes scales to produce more sooty mold, which protects them from predators</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi described two specific effects of urban heat islands: first, it stresses trees, making them more susceptible to pests; second, it accelerates the development of the insect itself. He noted that scales are particularly good at taking advantage of urban heat.
|
||||
<strong>Source in transcript:</strong> ~36:57–37:21, blocks 363–368</p>
|
||||
<hr />
|
||||
<h3 id="question-11">Question 11<a class="headerlink" href="#question-11" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 38:06 – 38:29
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A landscape company wants to use trunk injection of systemic insecticides to control a crapemyrtle bark scale infestation. Based on the presentation, what should they know?</p>
|
||||
<p>a) Trunk injection is the most effective method for CMBS control
|
||||
b) Trunk injection works but must be applied in fall
|
||||
c) Trunk injection is not a viable option because crapemyrtle absorbs systemic insecticides through the trunk very slowly
|
||||
d) Trunk injection is effective only on trees over 6 inches in diameter</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi specifically stated that chemical control of CMBS is complicated by the fact that crapemyrtle is not good at absorbing systemic insecticide through trunk injection, and that the chemical moves very slowly, making it not a viable option.
|
||||
<strong>Source in transcript:</strong> ~38:14–38:30, blocks 378–380</p>
|
||||
<hr />
|
||||
<h3 id="question-12">Question 12<a class="headerlink" href="#question-12" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 38:31 – 41:44
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>Which of the following is NOT one of the native predators Dr. Graziosi identified as feeding on crapemyrtle bark scale?</p>
|
||||
<p>a) Twice-stabbed lady beetle
|
||||
b) Green lacewing
|
||||
c) Bigeminal lady beetle
|
||||
d) Parasitoid wasp specialist from Asia</p>
|
||||
<p><strong>Correct Answer:</strong> d
|
||||
<strong>Explanation:</strong> Dr. Graziosi identified three lady beetle species (twice-stabbed, bigeminal, and Harlequin) and green lacewings (particularly the red-lipped green lacewing) as predators of CMBS in North America. He specifically noted that no effective parasitoid had yet been found for CMBS in the US, unlike the situation in Asia.
|
||||
<strong>Source in transcript:</strong> ~38:48–41:00, blocks 385–409</p>
|
||||
<hr />
|
||||
<h3 id="question-13">Question 13<a class="headerlink" href="#question-13" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 42:25 – 43:35
|
||||
<strong>Difficulty:</strong> Recall</p>
|
||||
<p>According to the presentation, the orange-striped oakworm moth primarily feeds on which group of trees?</p>
|
||||
<p>a) Ash species
|
||||
b) Crapemyrtles
|
||||
c) Red oaks, but also hickory, birch, and maple
|
||||
d) Pines and other conifers</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi described the orange-striped oakworm as a well-known pest of oaks, especially red oaks, but noted it can also feed on hickory, birch, and maple.
|
||||
<strong>Source in transcript:</strong> ~42:43–42:59, blocks 422–423</p>
|
||||
<hr />
|
||||
<h3 id="question-14">Question 14<a class="headerlink" href="#question-14" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 44:51 – 46:10
|
||||
<strong>Difficulty:</strong> Analysis</p>
|
||||
<p>Dr. Graziosi discussed Nuttall oaks on the UGA Athens campus as an example of vulnerability to the orange-striped oakworm. What underlying principle does this example illustrate about urban tree pest management?</p>
|
||||
<p>a) Nuttall oaks are a non-native species poorly adapted to Georgia
|
||||
b) Monoculture plantings of clonal nursery stock create genetically uniform populations where susceptibility in one tree means susceptibility in all
|
||||
c) Nuttall oaks are particularly attractive to oakworm moths due to their leaf chemistry
|
||||
d) Older trees are always more resistant to defoliating insects than younger ones</p>
|
||||
<p><strong>Correct Answer:</strong> b
|
||||
<strong>Explanation:</strong> Dr. Graziosi explained that urban trees often come from nurseries as clonal trees with very low genetic variability — "they are basically the same tree." Therefore the susceptibility of one tree reflects the susceptibility of all trees of that clone on campus, making them uniformly vulnerable.
|
||||
<strong>Source in transcript:</strong> ~45:00–46:05, blocks 452–460</p>
|
||||
<hr />
|
||||
<h3 id="question-15">Question 15<a class="headerlink" href="#question-15" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Timestamp Reference:</strong> 47:56 – 49:05
|
||||
<strong>Difficulty:</strong> Application</p>
|
||||
<p>A homeowner calls about an oak tree losing leaves in late September to orange-striped oakworm caterpillars. About 30% of the canopy has been defoliated. Based on Dr. Graziosi's decision framework, what is the most appropriate recommendation?</p>
|
||||
<p>a) Immediately apply a broad-spectrum systemic insecticide via soil drench
|
||||
b) Apply Btk foliar spray urgently before the tree dies
|
||||
c) Consider that late-season defoliation is less harmful because the tree has already stored nutrients, and monitor rather than treat aggressively
|
||||
d) Remove and replace the tree, as 30% defoliation is always fatal</p>
|
||||
<p><strong>Correct Answer:</strong> c
|
||||
<strong>Explanation:</strong> Dr. Graziosi outlined two key considerations: the 25% defoliation threshold distinguishes aesthetic from actual damage, and late-season defoliation (even if substantial) is less harmful because the tree has already stored its nutrients. A mature oak at 30% defoliation in late September, while above the threshold, benefits from the seasonal timing, suggesting monitoring may be more appropriate than aggressive chemical intervention.
|
||||
<strong>Source in transcript:</strong> ~48:05–48:44, blocks 482–486</p>
|
||||
<hr />
|
||||
<h2 id="verification-checklist">Verification Checklist<a class="headerlink" href="#verification-checklist" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li>[x] All 15 questions derived exclusively from presentation content</li>
|
||||
<li>[x] Timestamp references verified against corrected transcript</li>
|
||||
<li>[x] No external knowledge required to answer correctly</li>
|
||||
<li>[x] Difficulty distribution: 6 Recall / 6 Application / 3 Analysis</li>
|
||||
<li>[x] Coverage spans early (disease triangle), middle (EAB, CMBS), and late (oakworm) content</li>
|
||||
<li>[x] Answer keys unambiguous based on speaker's statements</li>
|
||||
<li>[x] Distractors plausible but clearly incorrect per presentation</li>
|
||||
<li>[x] No "all of the above" or "none of the above" options used</li>
|
||||
</ul>
|
||||
|
||||
|
||||
|
||||
|
||||
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||||
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|
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|
||||
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|
||||
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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Dr. Ignazio Graziosi — January 15, 2026
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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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||||
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||||
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||||
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||||
|
||||
<h1 id="review-prompts-graziosi-tree-pests">Review Prompts — Graziosi, Tree Pests<a class="headerlink" href="#review-prompts-graziosi-tree-pests" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 4 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="gtbop-moodle-review-prompts">GTBOP Moodle Review Prompts<a class="headerlink" href="#gtbop-moodle-review-prompts" title="Permanent link">¶</a></h1>
|
||||
<h2 id="understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies">Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies<a class="headerlink" href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" title="Permanent link">¶</a></h2>
|
||||
<h3 id="dr-ignazio-graziosi-january-15-2026">Dr. Ignazio Graziosi — January 15, 2026<a class="headerlink" href="#dr-ignazio-graziosi-january-15-2026" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Source:</strong> Corrected SRT transcript (Stage 1) + Archive Package (Stage 2)
|
||||
<strong>Prompts:</strong> 6 timestamp-linked review tasks</p>
|
||||
<p>These short review tasks structure self-paced viewing by directing students to specific video segments and asking them to identify key points.</p>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<h3 id="review-task-1">Review Task 1<a class="headerlink" href="#review-task-1" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Watch:</strong> 1:28 – 6:06
|
||||
<strong>Task:</strong> Identify the three components of the disease triangle and the three levels of the spiral of tree decline. For each spiral level, list one example factor that Dr. Graziosi names.
|
||||
<strong>Key Points to Identify:</strong>
|
||||
- Disease triangle: pest, host tree, environment
|
||||
- Predisposing factors (e.g., soil compaction, urban environment, genetic potential)
|
||||
- Inciting factors (e.g., defoliating insects, drought)
|
||||
- Contributing factors (e.g., wood-boring insects, nematodes, Armillaria)</p>
|
||||
<hr />
|
||||
<h3 id="review-task-2">Review Task 2<a class="headerlink" href="#review-task-2" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Watch:</strong> 8:23 – 10:47
|
||||
<strong>Task:</strong> Follow Dr. Graziosi's description of the emerald ash borer life cycle. List the diagnostic signs he describes for identifying an EAB-infested tree, and note the typical generation time.
|
||||
<strong>Key Points to Identify:</strong>
|
||||
- Larval galleries under bark disrupting phloem, cambium, and outer xylem
|
||||
- Water sprouts as a diagnostic feature
|
||||
- D-shaped exit holes from adult emergence
|
||||
- Primarily one generation per year, but a portion of the population takes two years</p>
|
||||
<hr />
|
||||
<h3 id="review-task-3">Review Task 3<a class="headerlink" href="#review-task-3" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Watch:</strong> 18:20 – 21:31
|
||||
<strong>Task:</strong> Dr. Graziosi presents the invasion curve diagram. Describe how pest prevalence changes over time and explain why early detection matters for control options and cost.
|
||||
<strong>Key Points to Identify:</strong>
|
||||
- Introduction → low prevalence → exponential growth → carrying capacity (plateau)
|
||||
- Early: eradication may be possible; prevention effective
|
||||
- Late: only local control (individual tree protection); costs increase dramatically
|
||||
- Land managers become aware before the general public</p>
|
||||
<hr />
|
||||
<h3 id="review-task-4">Review Task 4<a class="headerlink" href="#review-task-4" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Watch:</strong> 23:57 – 28:00
|
||||
<strong>Task:</strong> Describe the importation biological control program for EAB. Identify the three parasitoid wasp species' targets (what life stage each attacks) and explain why being specialists is an advantage.
|
||||
<strong>Key Points to Identify:</strong>
|
||||
- Two wasp species attack EAB larvae under bark (one uses vibrational cues and ovipositor to drill through bark)
|
||||
- One wasp species attacks EAB eggs
|
||||
- Specialists only attack EAB — won't waste their potential on other insects
|
||||
- Release technology: parasitized logs hung on trees; egg parasitoid released via small container ("O-binator")</p>
|
||||
<hr />
|
||||
<h3 id="review-task-5">Review Task 5<a class="headerlink" href="#review-task-5" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Watch:</strong> 29:42 – 38:30
|
||||
<strong>Task:</strong> Compare crapemyrtle bark scale to the emerald ash borer in terms of: (a) host specificity, (b) available biological control, and (c) effectiveness of trunk injection. Note specific differences Dr. Graziosi highlights.
|
||||
<strong>Key Points to Identify:</strong>
|
||||
- CMBS is a generalist (feeds on apple, soybean, fig, beautyberry, St. John's wort in addition to crapemyrtle); EAB is more host-specific (ash + white fringetree)
|
||||
- No effective specialist parasitoid found for CMBS in the US; EAB has imported specialist parasitoids
|
||||
- Trunk injection not viable for CMBS (crapemyrtle absorbs poorly); trunk injection is a viable option for EAB in ash</p>
|
||||
<hr />
|
||||
<h3 id="review-task-6">Review Task 6<a class="headerlink" href="#review-task-6" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Watch:</strong> 42:25 – 49:19
|
||||
<strong>Task:</strong> Explain Dr. Graziosi's two-part decision framework for determining whether to treat orange-striped oakworm. Then describe why clonal urban plantings are particularly vulnerable to this native pest.
|
||||
<strong>Key Points to Identify:</strong>
|
||||
- Part 1: Distinguish aesthetic vs. actual damage — threshold is ~25% defoliation
|
||||
- Part 2: Assess season — late-season defoliation less harmful (tree already stored nutrients)
|
||||
- Clonal nursery stock = low genetic variability = uniform susceptibility across all trees of the same clone
|
||||
- Urban heat island compounds the problem by accelerating insect development</p>
|
||||
<hr />
|
||||
<h2 id="verification-checklist">Verification Checklist<a class="headerlink" href="#verification-checklist" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li>[x] All review tasks reference specific, verifiable video segments</li>
|
||||
<li>[x] Key points match content actually presented in those segments</li>
|
||||
<li>[x] No external knowledge needed to complete tasks</li>
|
||||
<li>[x] Tasks progress through the full presentation (early → middle → late)</li>
|
||||
</ul>
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -78,7 +78,7 @@
|
||||
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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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|
||||
|
||||
|
||||
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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|
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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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|
||||
|
||||
Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
|
||||
|
||||
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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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NARRATIVE 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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|
||||
|
||||
YOUTUBE TIMESTAMPS
|
||||
|
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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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|
||||
|
||||
QUESTIONS & ANSWERS
|
||||
|
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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
|
||||
|
||||
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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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|
||||
|
||||
Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
|
||||
|
||||
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|
||||
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|
||||
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||||
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||||
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NARRATIVE SUMMARY
|
||||
|
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|
||||
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||||
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||||
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|
||||
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||||
YOUTUBE TIMESTAMPS
|
||||
|
||||
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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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|
||||
|
||||
QUESTIONS & ANSWERS
|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
|
||||
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|
||||
<a href="#additional-resources" class="md-nav__link">
|
||||
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|
||||
|
||||
ADDITIONAL RESOURCES
|
||||
|
||||
</span>
|
||||
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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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|
||||
@@ -2554,10 +2709,86 @@
|
||||
|
||||
|
||||
|
||||
<h1 id="archive-summary-graziosi-tree-pests">Archive Summary — Graziosi, Tree Pests<a class="headerlink" href="#archive-summary-graziosi-tree-pests" 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="understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies">Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies<a class="headerlink" href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Webinar Date:</strong> January 15, 2026
|
||||
<strong>Speaker:</strong> Dr. Ignazio Graziosi, Assistant Professor, Warnell School of Forestry and Natural Resources, University of Georgia
|
||||
<strong>Moderator:</strong> Dr. Bodie Pennisi, UGA Horticulturist
|
||||
<strong>Duration:</strong> 52:11
|
||||
<strong>Series:</strong> Green & Commercial
|
||||
<strong>CEU Categories:</strong> TBD</p>
|
||||
<hr />
|
||||
<h2 id="narrative-summary">NARRATIVE SUMMARY<a class="headerlink" href="#narrative-summary" title="Permanent link">¶</a></h2>
|
||||
<p>Dr. Ignazio Graziosi, an assistant professor in the Warnell School of Forestry and Natural Resources at the University of Georgia, presented a framework for understanding tree pest damage through ecological interactions. He emphasized that damage results from the interplay of three components — the pest, the host tree, and the environment — known as the disease triangle. He extended this concept through the spiral of tree decline, illustrating how predisposing factors like soil compaction, inciting factors like drought, and contributing factors including wood-boring insects and fungi push trees toward death, particularly in urban environments.</p>
|
||||
<p>Dr. Graziosi applied this framework to three case studies. The first examined the emerald ash borer (EAB), a non-native pest devastating native ash across North America. He reviewed the EAB life cycle, the role of firewood movement in spreading the invasion, and the diversity of ash species at risk in Georgia, including the white fringetree (family Oleaceae) as an alternate host and population reservoir. He explained how EAB populations remain low in Asia due to co-evolved resistant trees and specialist parasitoid wasps, which USDA has introduced to North America through importation biological control. Chemical protection via tree injection, bark spray, and soil drench remains critical for high-value landscape trees.</p>
|
||||
<p>The second case study addressed crapemyrtle bark scale (CMBS), a non-native pest attacking crapemyrtle (<em>Lagerstroemia indica</em>) across the South. Dr. Graziosi described overlapping generations that complicate control timing, an expanding host range including American beautyberry and St. John's wort, and urban heat island effects that stress trees while accelerating insect development. Chemical options include soil drench, soil injection, and foliar sprays, though trunk injection is ineffective in crapemyrtle. Native predators such as lady beetles and green lacewings provide some control but lack the specialization needed for sustained suppression.</p>
|
||||
<p>The third case study examined the orange-striped oakworm moth, a native pest of native oaks. Dr. Graziosi explained why clonal nursery stock in urban landscapes creates genetically uniform stands with low resistance, compounded by urban heat effects. He outlined a practical decision framework: managers should distinguish aesthetic damage from actual harm using a 25% defoliation threshold and recognize that late-season defoliation is less damaging. Btk (<em>Bacillus thuringiensis</em> kurstaki) as a foliar spray is effective against young larvae with minimal impact on natural enemies.</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
|
||||
1:28 The disease triangle: pest, tree, and environment
|
||||
3:02 The spiral of tree decline
|
||||
6:07 Native vs. non-native pest and tree interactions
|
||||
7:22 Example 1: Emerald ash borer (EAB) — overview
|
||||
8:23 EAB life cycle and damage symptoms
|
||||
10:48 EAB generation time and temperature effects
|
||||
11:57 EAB spread across North America and firewood
|
||||
13:47 EAB in Georgia and native ash species diversity
|
||||
15:26 White fringetree as alternate EAB host
|
||||
16:43 Global trade and non-native species introductions
|
||||
18:20 The invasion curve: detection, eradication, and control
|
||||
21:32 Why EAB is not a pest in Asia
|
||||
22:34 Chemical control methods for EAB
|
||||
23:57 Importation biological control: parasitoid wasps
|
||||
28:01 Native natural enemies and the goal of balance
|
||||
29:42 Example 2: Crapemyrtle bark scale (CMBS) — overview
|
||||
31:47 CMBS biology, life cycle, and overlapping generations
|
||||
33:47 CMBS invasion timeline and early detection
|
||||
35:02 CMBS and the invasion curve in Georgia
|
||||
36:06 CMBS host range expansion in North America
|
||||
36:42 Urban heat island effects on scales
|
||||
37:28 Chemical control options for CMBS
|
||||
38:31 Natural enemies: lady beetles and lacewings
|
||||
42:04 Balancing chemical and biological control for CMBS
|
||||
42:25 Example 3: Orange-striped oakworm moth — overview
|
||||
43:53 Oakworm life cycle and seasonal timing
|
||||
44:51 Why urban and clonal trees are vulnerable
|
||||
46:35 Natural enemies of the oakworm
|
||||
47:56 Control decisions: damage thresholds and Btk
|
||||
49:19 Presentation wrap-up and key takeaways
|
||||
50:01 Moderator comments on CMBS expansion in Georgia</p>
|
||||
<hr />
|
||||
<h2 id="questions-answers">QUESTIONS & ANSWERS<a class="headerlink" href="#questions-answers" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Q: What is the disease triangle, and why is it important for understanding tree pest damage?</strong>
|
||||
A: The disease triangle describes how damage to a tree results from the interaction of three components: the pest, the host tree, and the environment. Damage is not caused by the pest alone — a susceptible tree in a stressful environment amplifies the impact. Dr. Graziosi emphasized that this framework helps professionals identify which factors they can influence when managing pest problems, particularly in urban settings where environmental stress is high.</p>
|
||||
<p><strong>Q: What is the spiral of tree decline, and how does it relate to tree death in urban environments?</strong>
|
||||
A: The spiral of tree decline is a diagram with three levels of stressors — predisposing factors (such as soil compaction and genetic potential), inciting factors (such as defoliating insects and drought), and contributing factors (such as wood-boring insects, nematodes, and Armillaria). Each level can independently bring a tree to death, and urban environments intensify these stressors. The key takeaway is that tree death typically results from multiple interacting factors rather than a single cause.</p>
|
||||
<p><strong>Q: How does firewood movement contribute to the spread of the emerald ash borer?</strong>
|
||||
A: The movement of infested firewood by campers and travelers was the primary pathway for EAB's rapid spread across North America. Researchers were able to connect the pattern of EAB spread closely with the highway and freeway system. This led to the "Don't Move Firewood" campaign, which also helps contain other invasive insects such as the Asian longhorned beetle.</p>
|
||||
<p><strong>Q: Why is the emerald ash borer not considered a pest in its native range in Asia?</strong>
|
||||
A: Two main reasons explain this. First, native Asian ash species co-evolved with the EAB and are resistant or less susceptible — only very weak, stressed trees are attacked there. Second, a community of specialist natural enemies, including parasitoid wasps, keeps EAB populations low in Asia. This understanding directly informed both the chemical protection approach (making North American trees artificially resistant) and the importation biological control program.</p>
|
||||
<p><strong>Q: What are the chemical control options for protecting ash trees from the emerald ash borer?</strong>
|
||||
A: Three main application methods are available: tree injection, bark spray, and soil drench. Some products can be applied by homeowners while others require a professional applicator. Timing is important — for example, soil drench needs to be applied in spring before leaves emerge. Dr. Graziosi noted that chemical protection remains critical for saving individual high-value trees, since biological control has not yet been fully successful for EAB in North America.</p>
|
||||
<p><strong>Q: Why is trunk injection not effective for controlling crapemyrtle bark scale?</strong>
|
||||
A: Crapemyrtle does not absorb systemic insecticides well through trunk injection — the chemical moves very slowly through the plant, making it an ineffective delivery method. Instead, soil drench, soil injection, and foliar sprays are the recommended chemical control approaches for CMBS. Soaps can also be used to target crawlers, the young mobile nymphs.</p>
|
||||
<p><strong>Q: What native predators help control crapemyrtle bark scale, and what are their limitations?</strong>
|
||||
A: Three lady beetle species — the twice-stabbed lady beetle, the bigeminal lady beetle, and the non-native Harlequin lady beetle — are active predators of CMBS, feeding on both nymphs and adults. Green lacewings, particularly the red-lipped green lacewing, also prey on CMBS nymphs and eggs and are commercially available. However, these predators are generalists that often arrive late in the season and do not build sustained populations on infested trees, limiting their effectiveness as standalone control agents.</p>
|
||||
<p><strong>Q: How should a landscape professional decide whether to treat for orange-striped oakworm?</strong>
|
||||
A: Dr. Graziosi outlined a two-part decision framework. First, distinguish between aesthetic damage and actual harm to the tree — the threshold is approximately 25% defoliation. Second, assess the season: late-season defoliation, even if substantial, is less harmful because the tree has already stored its nutrients. Treatment is most warranted for young or small trees experiencing significant early-season defoliation.</p>
|
||||
<p><strong>Q: Why are urban landscape trees particularly vulnerable to the orange-striped oakworm?</strong>
|
||||
A: Urban landscape trees are often clonal nursery stock with very low genetic variability. Dr. Graziosi used the example of Nuttall oaks on the UGA Athens campus — beautiful, high-quality trees that are essentially genetically identical, meaning the susceptibility of one tree is the susceptibility of all. Combined with urban heat island effects that accelerate insect development, this creates conditions favoring pest outbreaks.</p>
|
||||
<p><strong>Q: What is importation biological control, and how has it been applied to the emerald ash borer?</strong>
|
||||
A: Importation biological control involves studying the natural enemies that effectively control a pest in its native range and introducing them to the invaded region. USDA conducted risk assessments and introduced three specialist parasitoid wasp species from Asia to target EAB. Two species attack EAB larvae under the bark using ovipositors to locate them through vibrational cues, while the third parasitizes EAB eggs. These wasps are specialists that only attack EAB, ensuring they won't harm other insects.</p>
|
||||
<p><strong>Q: What is the significance of the white fringetree for emerald ash borer management in Georgia?</strong>
|
||||
A: The white fringetree, which belongs to the same family (Oleaceae) as ash, was discovered in 2014 to be an alternate host for the EAB. This is significant not only because it means another native plant species is at risk, but more importantly because white fringetree can serve as a population reservoir, allowing EAB to persist in an area even after all ash trees are gone. This has direct implications for long-term management strategies in Georgia.</p>
|
||||
<hr />
|
||||
<h2 id="additional-resources">ADDITIONAL RESOURCES<a class="headerlink" href="#additional-resources" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li>Dr. Graziosi referenced QR codes linking to UGA publications on EAB status and control in Georgia, the full insecticide protocol for EAB, and CMBS biology and management.</li>
|
||||
<li>The iTree tool suite (mentioned for calculating ecosystem services and benefits of trees, and for right-tree-right-place selection) is available at itreetools.org.</li>
|
||||
<li>Sign-in sheets for CEU credit should be submitted to gtbop@uga.edu or mailed to the address on the sign-in sheet.</li>
|
||||
<li>The next GTBOP webinar was announced for March 2026.</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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|
||||
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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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File: Tree Pests in the Landscape — Dr. Ignazio Graziosi
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Emerald Ash Borer — Name Corrections (extensive)
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Crapemyrtle Bark Scale — Name Corrections
|
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Technical Terms — Tree Biology
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File: Tree Pests in the Landscape — Dr. Ignazio Graziosi
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Emerald Ash Borer — Name Corrections (extensive)
|
||||
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||||
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|
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Technical Terms — Tree Biology
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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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|
||||
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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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|
||||
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|
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||||
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|
||||
|
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|
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||||
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@@ -2554,12 +2941,252 @@
|
||||
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||||
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||||
|
||||
<h1 id="transcript-corrections-graziosi-tree-pests">Transcript Corrections — Graziosi, Tree Pests<a class="headerlink" href="#transcript-corrections-graziosi-tree-pests" 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-tree-pests-in-the-landscape-dr-ignazio-graziosi">File: Tree Pests in the Landscape — Dr. Ignazio Graziosi<a class="headerlink" href="#file-tree-pests-in-the-landscape-dr-ignazio-graziosi" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Date Corrected:</strong> February 8, 2026
|
||||
<strong>Webinar Date:</strong> January 15, 2026
|
||||
<strong>Series:</strong> Green & Commercial
|
||||
<strong>Topic:</strong> Entomology / Tree Health / Urban Forestry
|
||||
<strong>Speaker:</strong> Dr. Ignazio Graziosi, Assistant Professor, Warnell School of Forestry and Natural Resources, University of Georgia
|
||||
<strong>Moderator:</strong> Dr. Bodie Pennisi, UGA Horticulturist
|
||||
<strong>Closing:</strong> Rich Braman</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> 529</li>
|
||||
<li><strong>Corrected blocks:</strong> 529 ✓ MATCH CONFIRMED</li>
|
||||
<li><strong>Time range:</strong> 00:00:01,100 to 00:52:11,580</li>
|
||||
<li><strong>Runtime:</strong> ~52 minutes</li>
|
||||
<li><strong>File reading:</strong> COMPLETE ✓</li>
|
||||
<li><strong>Coverage proof:</strong></li>
|
||||
<li>Early [~2:28]: Disease triangle concept — pest, tree, and environment interaction causes damage</li>
|
||||
<li>Middle [~24:03]: Importation biological control for EAB — parasitoid wasps brought from Asia to North America</li>
|
||||
<li>Late [~48:46]: Btk (Bacillus thuringiensis kurstaki) as foliar spray for orange-striped oakworm control; 25% defoliation threshold</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>"Ignacio" → "Ignazio" (Blocks 2, 503)</li>
|
||||
<li>"Bori" → "Bodie" (Blocks 15, 62)</li>
|
||||
<li>"body" → "Bodie" (Block 502)</li>
|
||||
<li>"Bodhi" → "Bodie" (Block 526)</li>
|
||||
<li>"buddy" → "Bodie" (Block 519 — Graziosi farewell to Pennisi)</li>
|
||||
</ul>
|
||||
<h3 id="emerald-ash-borer-name-corrections-extensive">Emerald Ash Borer — Name Corrections (extensive)<a class="headerlink" href="#emerald-ash-borer-name-corrections-extensive" title="Permanent link">¶</a></h3>
|
||||
<p>Whisper produced dozens of garbled variants of "emerald ash borer" and its abbreviation "EAB" throughout the transcript. All were corrected to the standard forms:</p>
|
||||
<p><strong>Full name variants corrected → "emerald ash borer":</strong>
|
||||
- "emeralish borer" (Blocks 84, 85)
|
||||
- "emeralash borer" (Blocks 87, 88)
|
||||
- "gemaralash borer" (Block 100)
|
||||
- "Emmerlash border" (Blocks 123, 124)
|
||||
- "emeralosh borer" (Block 91)
|
||||
- "Yemalash Bor" (Block 146)
|
||||
- "Ammonash war" (Block 150)
|
||||
- "MLA-Scheish border" (Block 163)
|
||||
- "Amaralash border" (Block 220)</p>
|
||||
<p><strong>Abbreviation variants corrected → "EAB":</strong>
|
||||
- "EAD" (Block 91)
|
||||
- "IAB" (Blocks 278, 280, 281)
|
||||
- "AAB" (Blocks 170, 171, 172, 173)
|
||||
- "EEA-B" (Block 229)
|
||||
- "AB" (Block 297)
|
||||
- "AEB" (Blocks 185, 186)
|
||||
- "yebby" / "yebe" / "yee-be" / "yeb" / "yebis" (Blocks 188, 193, 243, 254, 257, 263, 265, 266, 269, 270)
|
||||
- "the baby" (Block 243 — context: "the EAB there")
|
||||
- "the bee" (Block 264 — context: parasitoid drilling into bark)
|
||||
- "YB" (Block 170)</p>
|
||||
<p><strong>Total EAB-related corrections: ~45+ individual instances</strong></p>
|
||||
<h3 id="crapemyrtle-bark-scale-name-corrections">Crapemyrtle Bark Scale — Name Corrections<a class="headerlink" href="#crapemyrtle-bark-scale-name-corrections" title="Permanent link">¶</a></h3>
|
||||
<p>All variants standardized to "crapemyrtle bark scale" (one word, no hyphen per extension convention):
|
||||
- "crepe-mirtle bark scale" → "crapemyrtle bark scale" (multiple blocks)
|
||||
- "crepe-myrtle bark scale" → "crapemyrtle bark scale"
|
||||
- "crepe myrtle bark scale" → "crapemyrtle bark scale"
|
||||
- "crepe-mirtle bar scale" → "crapemyrtle bark scale"
|
||||
- "crepe myrtle bar scale" → "crapemyrtle bark scale"
|
||||
- "crab myrtle basket" → "crapemyrtle bark scale" (Block 337)
|
||||
- "capemir" → "crapemyrtle" (Block 404)
|
||||
- "bar scale" → "bark scale" (Blocks 334, 405)
|
||||
- All standalone "crepe myrtle" / "crepe-myrtle" / "crepe-mirtle" → "crapemyrtle"</p>
|
||||
<h3 id="scientific-names">Scientific Names<a class="headerlink" href="#scientific-names" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"Lagerstrenia indica" → "<em>Lagerstroemia indica</em>" (Block 304)</li>
|
||||
<li>"La Grestorhemia speciosa" → "<em>Lagerstroemia speciosa</em>" (Block 353)</li>
|
||||
<li>"armillaria" → "Armillaria" (Block 57 — genus capitalized)</li>
|
||||
<li>"oleese" → "Oleaceae" (Block 165)</li>
|
||||
</ul>
|
||||
<h3 id="technical-terms-entomology">Technical Terms — Entomology<a class="headerlink" href="#technical-terms-entomology" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"four-inch star" → "fourth instar" (Block 102)</li>
|
||||
<li>"pre-culture" → "prepupa" (Block 107)</li>
|
||||
<li>"ovopositor" → "ovipositor" (Block 264, 2 instances)</li>
|
||||
<li>"T's tail … T's ovipositor" → "Its tail … its ovipositor" (Block 264)</li>
|
||||
<li>"BDK, Bacillus thuringiensis, Crustacea" → "Btk, Bacillus thuringiensis kurstaki" (Blocks 488–489)</li>
|
||||
<li>"inseticides" → "insecticides" (Block 231)</li>
|
||||
<li>"twice-tapped" → "twice-stabbed" (Block 392)</li>
|
||||
<li>"ladybeadle" → "lady beetle" (Blocks 393, 394, multiple instances)</li>
|
||||
<li>"Geminal" / "begeminal" → "bigeminal" (Blocks 392, 393)</li>
|
||||
<li>"infuriate the biological control" → "interfere with the biological control" (Block 415)</li>
|
||||
<li>"incident" → "insect" (Block 327 — "stages of the insect")</li>
|
||||
</ul>
|
||||
<h3 id="technical-terms-tree-biology">Technical Terms — Tree Biology<a class="headerlink" href="#technical-terms-tree-biology" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"the camium, the artoxylem" → "the cambium, the outer xylem" (Block 92)</li>
|
||||
<li>"are incapacity" → "carrying capacity" (Block 207)</li>
|
||||
<li>"interesting trace" → "interesting tree" (Block 155 — about blue ash)</li>
|
||||
</ul>
|
||||
<h3 id="species-names">Species Names<a class="headerlink" href="#species-names" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"orange-type wormoth" → "orange-striped oakworm moth" (Blocks 461, 464)</li>
|
||||
<li>"orange-type oak wormoth" → "orange-striped oakworm moth" (Block 421 was correct; Block 461 corrected)</li>
|
||||
<li>"orange stripe, / awkward mouth" → "orange-striped / oakworm moth" (Blocks 474–475)</li>
|
||||
<li>"natal oaks" → "Nuttall oaks" (Block 456)</li>
|
||||
<li>"Nuttal oak" → "Nuttall oak" (Block 460)</li>
|
||||
<li>"white fring tree" → "white fringetree" (Blocks 165, 357)</li>
|
||||
<li>"white fringe tree" → "white fringetree" (Blocks 168, 169, 172)</li>
|
||||
<li>"four webworm" → "fall webworm" (Block 29)</li>
|
||||
</ul>
|
||||
<h3 id="pest-names-other">Pest Names / Other<a class="headerlink" href="#pest-names-other" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"also can't send John's work" → "also on St. John's wort" (Block 358)</li>
|
||||
<li>"in the festive fire" → "infested firewood" (Block 137)</li>
|
||||
<li>"non-80 species" → "non-native species" (Block 181)</li>
|
||||
<li>"expansion of the past" → "expansion of the pest" (Block 506)</li>
|
||||
<li>"contain the incident to quarantine" → "contain the insect through quarantine" (Block 130)</li>
|
||||
</ul>
|
||||
<h3 id="grammar-transcription-cleanup">Grammar / Transcription Cleanup<a class="headerlink" href="#grammar-transcription-cleanup" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>"invasive invasive species" → "invasive species" (Block 5 — Whisper doubled word)</li>
|
||||
<li>"those past" → "those pests" (Block 76)</li>
|
||||
<li>"different tests" → "different pests" (Block 77)</li>
|
||||
<li>"This is the map, is the trap" → "This is the trap" (Block 186)</li>
|
||||
</ul>
|
||||
<hr />
|
||||
<h2 id="flagged-for-verification">Flagged for Verification<a class="headerlink" href="#flagged-for-verification" title="Permanent link">¶</a></h2>
|
||||
<ul>
|
||||
<li>
|
||||
<p><strong>Block 45:</strong> [VERIFY: "Dr. Klein"] — Speaker references "Dr. Klein" as the previous presenter on the webinar. Confirm name against webinar program for January 15, 2026.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 161:</strong> [VERIFY: "swamp white and small ash"] — Speaker lists Georgia ash species. "Swamp white ash" is not a standard species name. "Small ash" may refer to <em>Fraxinus smallii</em> (Small's ash). Verify species list against audio.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 176:</strong> [VERIFY: "this not accidental introduction"] — Meaning is likely "this accidental introduction" (EAB was accidentally introduced via trade). Whisper may have misplaced "not" from later in the sentence. Verify against audio.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 277:</strong> [VERIFY: "the O-binator"] — Name of egg parasitoid release device. Possibly "Oobinator" (a play on <em>Oobius agrili</em>, the egg parasitoid). Verify device name against audio and USDA-ARS biocontrol literature.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 392–393:</strong> [VERIFY: "bigeminal lady beetle"] — Corrected from "begeminal" / "Geminal ladybeadle." Likely refers to <em>Hyperaspis bigeminata</em>, a documented predator of crapemyrtle bark scale. Confirm species name against audio.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 473–474:</strong> [VERIFY: "pinnacle leaf"] — Speaker describes underside of a leaf with oakworm eggs. "Pinnacle" is not a standard botanical term. Possibly "pin oak leaf" spoken with Italian accent. Verify against audio.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 511:</strong> [VERIFY: "the planet"] — Bodie Pennisi says "all across the areas around the planet." Context suggests she may have said "the plantings" (discussing CMBS in Savannah plantings). Verify against audio.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Block 528:</strong> [VERIFY: "buddy"] — Rich Braman says "I'll see you soon, buddy." Could be the word "buddy" or a misheard "Bodie." Left as-is pending audio verification.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><strong>Blocks 13–14:</strong> [VERIFY: "education and analysis. / outreach."] — These blocks have overlapping timestamps (13 ends at 01:01.380, 14 starts at 01:00.920). Block 13's "analysis" may actually be "outreach" (matching block 14). Verify against audio.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<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 (1–529)
|
||||
✅ Blank lines between segments preserved
|
||||
✅ Maximum 2 lines per subtitle segment maintained
|
||||
✅ No segments merged or split
|
||||
✅ Block count: 529 original = 529 corrected ✓</p>
|
||||
<hr />
|
||||
<h2 id="new-patterns-for-common-corrections-reference">New Patterns for Common Corrections Reference<a class="headerlink" href="#new-patterns-for-common-corrections-reference" title="Permanent link">¶</a></h2>
|
||||
<p>The following Whisper error patterns are new to this webinar and should be added to the project reference:</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Whisper Output</th>
|
||||
<th>Correct Form</th>
|
||||
<th>Context</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>emeralish/emeralash/gemaralash/Emmerlash/emeralosh borer</td>
|
||||
<td>emerald ash borer</td>
|
||||
<td>Multiple phonetic approximations</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>yebby / yebe / yee-be / yeb</td>
|
||||
<td>EAB</td>
|
||||
<td>Whisper interpreting the abbreviation spoken with accent</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>IAB / AAB / EAD / EEA-B / AEB / AB</td>
|
||||
<td>EAB</td>
|
||||
<td>Abbreviation variants</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>four-inch star</td>
|
||||
<td>fourth instar</td>
|
||||
<td>Entomology life stage</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>ovopositor</td>
|
||||
<td>ovipositor</td>
|
||||
<td>Entomology anatomy</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>pre-culture</td>
|
||||
<td>prepupa</td>
|
||||
<td>Entomology life stage</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>ladybeadle</td>
|
||||
<td>lady beetle</td>
|
||||
<td>Common name</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>twice-tapped</td>
|
||||
<td>twice-stabbed</td>
|
||||
<td>Lady beetle common name</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>BDK / Crustacea</td>
|
||||
<td>Btk / kurstaki</td>
|
||||
<td><em>Bacillus thuringiensis</em> subspecies</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>La Grestorhemia / Lagerstrenia</td>
|
||||
<td>Lagerstroemia</td>
|
||||
<td>Crapemyrtle genus</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>natal oaks</td>
|
||||
<td>Nuttall oaks</td>
|
||||
<td>Oak species</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>crab myrtle basket</td>
|
||||
<td>crapemyrtle bark scale</td>
|
||||
<td>Pest common name</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>in the festive fire</td>
|
||||
<td>infested firewood</td>
|
||||
<td>EAB spread pathway</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>can't send John's work</td>
|
||||
<td>St. John's wort</td>
|
||||
<td>CMBS alternate host</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<hr />
|
||||
<p><strong>Total Corrections:</strong> ~120+ individual corrections across 529 subtitle blocks
|
||||
<strong>Processing:</strong> Complete file (529 subtitle blocks, 2116 lines)</p>
|
||||
|
||||
|
||||
|
||||
|
||||
+258
-6
@@ -78,7 +78,7 @@
|
||||
<div data-md-component="skip">
|
||||
|
||||
|
||||
<a href="#extension-agent-version-graziosi-tree-pests" class="md-skip">
|
||||
<a href="#gtbop-webinar-extension-agent-resource" class="md-skip">
|
||||
Skip to content
|
||||
</a>
|
||||
|
||||
@@ -780,6 +780,24 @@
|
||||
|
||||
|
||||
|
||||
<label class="md-nav__link md-nav__link--active" for="__toc">
|
||||
|
||||
|
||||
|
||||
<span class="md-ellipsis">
|
||||
|
||||
|
||||
Extension Agent
|
||||
|
||||
|
||||
|
||||
</span>
|
||||
|
||||
|
||||
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
</label>
|
||||
|
||||
<a href="./" class="md-nav__link md-nav__link--active">
|
||||
|
||||
|
||||
@@ -797,6 +815,97 @@
|
||||
|
||||
</a>
|
||||
|
||||
|
||||
|
||||
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<label class="md-nav__title" for="__toc">
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
Table of contents
|
||||
</label>
|
||||
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
<nav class="md-nav" aria-label="Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies">
|
||||
<ul class="md-nav__list">
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#webinar-details" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Webinar Details
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#ceu-information" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
CEU Information
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#content-summary" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Content Summary
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#key-concepts-for-agent-programs" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Key Concepts for Agent Programs
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#suggested-pairings" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Suggested Pairings
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
|
||||
@@ -2539,6 +2648,86 @@
|
||||
|
||||
|
||||
|
||||
<label class="md-nav__title" for="__toc">
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
Table of contents
|
||||
</label>
|
||||
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
<nav class="md-nav" aria-label="Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies">
|
||||
<ul class="md-nav__list">
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#webinar-details" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Webinar Details
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#ceu-information" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
CEU Information
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#content-summary" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Content Summary
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#key-concepts-for-agent-programs" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Key Concepts for Agent Programs
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#suggested-pairings" class="md-nav__link">
|
||||
<span class="md-ellipsis">
|
||||
|
||||
Suggested Pairings
|
||||
|
||||
</span>
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
|
||||
</nav>
|
||||
</div>
|
||||
</div>
|
||||
@@ -2554,12 +2743,75 @@
|
||||
|
||||
|
||||
|
||||
<h1 id="extension-agent-version-graziosi-tree-pests">Extension Agent Version — Graziosi, Tree Pests<a class="headerlink" href="#extension-agent-version-graziosi-tree-pests" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 3 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="gtbop-webinar-extension-agent-resource">GTBOP Webinar — Extension Agent Resource<a class="headerlink" href="#gtbop-webinar-extension-agent-resource" title="Permanent link">¶</a></h1>
|
||||
<h2 id="understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies">Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies<a class="headerlink" href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" title="Permanent link">¶</a></h2>
|
||||
<hr />
|
||||
<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
|
||||
<h3 id="webinar-details">Webinar Details<a class="headerlink" href="#webinar-details" title="Permanent link">¶</a></h3>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Field</th>
|
||||
<th>Details</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><strong>Date</strong></td>
|
||||
<td>January 15, 2026</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Speaker</strong></td>
|
||||
<td>Dr. Ignazio Graziosi, Assistant Professor, Warnell School of Forestry and Natural Resources, University of Georgia</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Moderator</strong></td>
|
||||
<td>Dr. Bodie Pennisi, UGA Horticulturist</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Duration</strong></td>
|
||||
<td>52 minutes, 11 seconds</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>Series</strong></td>
|
||||
<td>Green & Commercial</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><strong>CEU Categories</strong></td>
|
||||
<td>TBD</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<hr />
|
||||
<h3 id="ceu-information">CEU Information<a class="headerlink" href="#ceu-information" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Applicable License Categories (pending confirmation):</strong>
|
||||
- Category 24 — Ornamental and Turf Pest Control (likely primary)
|
||||
- Category 27 — Right-of-Way Pest Control (possible secondary)</p>
|
||||
<p><strong>Credit Hours:</strong> TBD</p>
|
||||
<p><strong>Viewing Instructions for Asynchronous CEU Delivery:</strong>
|
||||
This archived webinar may be used for self-paced continuing education. Viewers should watch the full presentation (approximately 52 minutes), complete any required assessment activities, and submit documentation per county or program requirements. Sign-in sheets should be submitted to gtbop@uga.edu or mailed to the address printed at the top of the sign-in sheet.</p>
|
||||
<hr />
|
||||
<h3 id="content-summary">Content Summary<a class="headerlink" href="#content-summary" title="Permanent link">¶</a></h3>
|
||||
<p>Dr. Ignazio Graziosi presents a framework for understanding tree pest damage using the disease triangle (pest, host tree, environment) and spiral of tree decline. The presentation is organized around three case studies that cover the major pest-host interaction scenarios landscape professionals encounter:</p>
|
||||
<p><strong>Case Study 1 — Emerald Ash Borer (EAB): Non-native pest on native trees</strong>
|
||||
Covers EAB life cycle and damage identification (water sprouts, D-shaped exit holes, canopy dieback), the role of firewood in spreading the invasion, Georgia's ash species diversity and the white fringetree as an alternate host, the invasion curve concept, importation biological control using specialist parasitoid wasps from Asia, and chemical protection methods (tree injection, bark spray, soil drench). Relevant for agents advising on ash tree conservation and urban forest management.</p>
|
||||
<p><strong>Case Study 2 — Crapemyrtle Bark Scale (CMBS): Non-native pest on non-native trees</strong>
|
||||
Covers CMBS identification (white females, pink eggs, sooty mold), overlapping generations, host range expansion to American beautyberry and St. John's wort, urban heat island effects, chemical control options (soil drench, soil injection, foliar spray — note trunk injection is not effective for crapemyrtle), and the role of lady beetles and green lacewings as predators. Particularly relevant for Georgia agents, as the invasion is still at an early stage in much of the state.</p>
|
||||
<p><strong>Case Study 3 — Orange-Striped Oakworm Moth: Native pest on native trees</strong>
|
||||
Covers life cycle and seasonal timing (late summer/fall, two generations in the South), vulnerability of clonal urban tree plantings with low genetic diversity, natural enemies, and a practical decision framework: 25% defoliation threshold for treatment, and the reduced harm of late-season defoliation. Btk (<em>Bacillus thuringiensis</em> kurstaki) as a selective foliar spray is the recommended first option.</p>
|
||||
<hr />
|
||||
<h3 id="key-concepts-for-agent-programs">Key Concepts for Agent Programs<a class="headerlink" href="#key-concepts-for-agent-programs" title="Permanent link">¶</a></h3>
|
||||
<p>These concepts from the presentation are well-suited for county programming and client consultations:</p>
|
||||
<p><strong>Disease Triangle</strong> — Damage is an interaction of pest, host, and environment. Helps clients understand why the same pest causes different levels of damage in different settings.</p>
|
||||
<p><strong>Spiral of Tree Decline</strong> — Multiple stressor categories (predisposing, inciting, contributing) interact. Soil compaction alone can bring a tree to death. Useful for educating clients on urban tree care beyond pest control.</p>
|
||||
<p><strong>Invasion Curve</strong> — Early detection enables more effective and less costly control. Relevant for CMBS messaging in counties where the pest has not yet established at high levels.</p>
|
||||
<p><strong>Urban Heat Island Effects</strong> — Stresses trees while accelerating insect development. Relevant for any agent working in urban/suburban landscapes.</p>
|
||||
<p><strong>Aesthetic vs. Actual Damage</strong> — The 25% defoliation threshold and seasonal timing consideration help agents advise clients on when treatment is and isn't warranted.</p>
|
||||
<hr />
|
||||
<h3 id="suggested-pairings">Suggested Pairings<a class="headerlink" href="#suggested-pairings" title="Permanent link">¶</a></h3>
|
||||
<p>This webinar complements other GTBOP content covering urban tree care, scale insect management, and integrated pest management principles. It pairs well with presentations on ornamental pest identification, systemic insecticide application, and biological control in landscape settings.</p>
|
||||
<hr />
|
||||
<p><em>Getting the Best of Pests (GTBOP) | UGA Center for Urban Agriculture</em>
|
||||
<em>For questions about CEU delivery or archived webinar use, contact gtbop@uga.edu</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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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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||||
<h1 id="website-version-graziosi-tree-pests">Website Version — Graziosi, Tree Pests<a class="headerlink" href="#website-version-graziosi-tree-pests" title="Permanent link">¶</a></h1>
|
||||
<blockquote>
|
||||
<p><strong>Placeholder</strong> — Paste your Stage 3 pipeline output here.</p>
|
||||
</blockquote>
|
||||
<h1 id="gtbop-webinar-archive">GTBOP Webinar Archive<a class="headerlink" href="#gtbop-webinar-archive" title="Permanent link">¶</a></h1>
|
||||
<h2 id="understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies">Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies<a class="headerlink" href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" title="Permanent link">¶</a></h2>
|
||||
<p><strong>Webinar Date:</strong> January 15, 2026
|
||||
<strong>Speaker:</strong> Dr. Ignazio Graziosi, Assistant Professor, Warnell School of Forestry and Natural Resources, University of Georgia
|
||||
<strong>Moderator:</strong> Dr. Bodie Pennisi, UGA Horticulturist
|
||||
<strong>Duration:</strong> 52:11
|
||||
<strong>Series:</strong> Green & Commercial
|
||||
<strong>CEU Categories:</strong> TBD</p>
|
||||
<hr />
|
||||
<h3 id="summary">Summary<a class="headerlink" href="#summary" title="Permanent link">¶</a></h3>
|
||||
<p>Dr. Ignazio Graziosi, an assistant professor in the Warnell School of Forestry and Natural Resources at the University of Georgia, presents a framework for understanding tree pest damage through ecological interactions. Using the disease triangle and spiral of tree decline, he examines how the pest, host tree, and environment interact to produce damage — particularly in stressful urban settings.</p>
|
||||
<p>Three case studies illustrate different ecological scenarios. The emerald ash borer (EAB), a non-native pest devastating native ash, demonstrates the value of importation biological control using specialist parasitoid wasps from Asia, the invasion curve concept, and the continued importance of chemical protection for high-value trees. Crapemyrtle bark scale (CMBS), a non-native pest on non-native crapemyrtle (<em>Lagerstroemia indica</em>), highlights challenges including overlapping generations, expanding host range to American beautyberry and St. John's wort, urban heat island effects, and the limitations of generalist native predators. The orange-striped oakworm moth, a native pest of native oaks, illustrates how low genetic diversity in clonal urban plantings and environmental stress create vulnerability, with practical guidance on the 25% defoliation threshold and Btk (<em>Bacillus thuringiensis</em> kurstaki) as a selective foliar treatment.</p>
|
||||
<hr />
|
||||
<h3 id="video-chapters">Video Chapters<a class="headerlink" href="#video-chapters" title="Permanent link">¶</a></h3>
|
||||
<p>0:00 Introduction and speaker credentials
|
||||
1:28 The disease triangle: pest, tree, and environment
|
||||
3:02 The spiral of tree decline
|
||||
6:07 Native vs. non-native pest and tree interactions
|
||||
7:22 Example 1: Emerald ash borer (EAB) — overview
|
||||
8:23 EAB life cycle and damage symptoms
|
||||
10:48 EAB generation time and temperature effects
|
||||
11:57 EAB spread across North America and firewood
|
||||
13:47 EAB in Georgia and native ash species diversity
|
||||
15:26 White fringetree as alternate EAB host
|
||||
16:43 Global trade and non-native species introductions
|
||||
18:20 The invasion curve: detection, eradication, and control
|
||||
21:32 Why EAB is not a pest in Asia
|
||||
22:34 Chemical control methods for EAB
|
||||
23:57 Importation biological control: parasitoid wasps
|
||||
28:01 Native natural enemies and the goal of balance
|
||||
29:42 Example 2: Crapemyrtle bark scale (CMBS) — overview
|
||||
31:47 CMBS biology, life cycle, and overlapping generations
|
||||
33:47 CMBS invasion timeline and early detection
|
||||
35:02 CMBS and the invasion curve in Georgia
|
||||
36:06 CMBS host range expansion in North America
|
||||
36:42 Urban heat island effects on scales
|
||||
37:28 Chemical control options for CMBS
|
||||
38:31 Natural enemies: lady beetles and lacewings
|
||||
42:04 Balancing chemical and biological control for CMBS
|
||||
42:25 Example 3: Orange-striped oakworm moth — overview
|
||||
43:53 Oakworm life cycle and seasonal timing
|
||||
44:51 Why urban and clonal trees are vulnerable
|
||||
46:35 Natural enemies of the oakworm
|
||||
47:56 Control decisions: damage thresholds and Btk
|
||||
49:19 Presentation wrap-up and key takeaways
|
||||
50:01 Moderator comments on CMBS expansion in Georgia</p>
|
||||
<hr />
|
||||
<h3 id="questions-answers">Questions & Answers<a class="headerlink" href="#questions-answers" title="Permanent link">¶</a></h3>
|
||||
<p><strong>Q: What is the disease triangle, and why is it important for understanding tree pest damage?</strong>
|
||||
A: The disease triangle describes how damage to a tree results from the interaction of three components: the pest, the host tree, and the environment. Damage is not caused by the pest alone — a susceptible tree in a stressful environment amplifies the impact. Dr. Graziosi emphasized that this framework helps professionals identify which factors they can influence when managing pest problems, particularly in urban settings where environmental stress is high.</p>
|
||||
<p><strong>Q: What is the spiral of tree decline, and how does it relate to tree death in urban environments?</strong>
|
||||
A: The spiral of tree decline is a diagram with three levels of stressors — predisposing factors (such as soil compaction and genetic potential), inciting factors (such as defoliating insects and drought), and contributing factors (such as wood-boring insects, nematodes, and Armillaria). Each level can independently bring a tree to death, and urban environments intensify these stressors. The key takeaway is that tree death typically results from multiple interacting factors rather than a single cause.</p>
|
||||
<p><strong>Q: How does firewood movement contribute to the spread of the emerald ash borer?</strong>
|
||||
A: The movement of infested firewood by campers and travelers was the primary pathway for EAB's rapid spread across North America. Researchers were able to connect the pattern of EAB spread closely with the highway and freeway system. This led to the "Don't Move Firewood" campaign, which also helps contain other invasive insects such as the Asian longhorned beetle.</p>
|
||||
<p><strong>Q: Why is the emerald ash borer not considered a pest in its native range in Asia?</strong>
|
||||
A: Two main reasons explain this. First, native Asian ash species co-evolved with the EAB and are resistant or less susceptible — only very weak, stressed trees are attacked there. Second, a community of specialist natural enemies, including parasitoid wasps, keeps EAB populations low in Asia. This understanding directly informed both the chemical protection approach (making North American trees artificially resistant) and the importation biological control program.</p>
|
||||
<p><strong>Q: What are the chemical control options for protecting ash trees from the emerald ash borer?</strong>
|
||||
A: Three main application methods are available: tree injection, bark spray, and soil drench. Some products can be applied by homeowners while others require a professional applicator. Timing is important — for example, soil drench needs to be applied in spring before leaves emerge. Dr. Graziosi noted that chemical protection remains critical for saving individual high-value trees, since biological control has not yet been fully successful for EAB in North America.</p>
|
||||
<p><strong>Q: Why is trunk injection not effective for controlling crapemyrtle bark scale?</strong>
|
||||
A: Crapemyrtle does not absorb systemic insecticides well through trunk injection — the chemical moves very slowly through the plant, making it an ineffective delivery method. Instead, soil drench, soil injection, and foliar sprays are the recommended chemical control approaches for CMBS. Soaps can also be used to target crawlers, the young mobile nymphs.</p>
|
||||
<p><strong>Q: What native predators help control crapemyrtle bark scale, and what are their limitations?</strong>
|
||||
A: Three lady beetle species — the twice-stabbed lady beetle, the bigeminal lady beetle, and the non-native Harlequin lady beetle — are active predators of CMBS, feeding on both nymphs and adults. Green lacewings, particularly the red-lipped green lacewing, also prey on CMBS nymphs and eggs and are commercially available. However, these predators are generalists that often arrive late in the season and do not build sustained populations on infested trees, limiting their effectiveness as standalone control agents.</p>
|
||||
<p><strong>Q: How should a landscape professional decide whether to treat for orange-striped oakworm?</strong>
|
||||
A: Dr. Graziosi outlined a two-part decision framework. First, distinguish between aesthetic damage and actual harm to the tree — the threshold is approximately 25% defoliation. Second, assess the season: late-season defoliation, even if substantial, is less harmful because the tree has already stored its nutrients. Treatment is most warranted for young or small trees experiencing significant early-season defoliation.</p>
|
||||
<p><strong>Q: Why are urban landscape trees particularly vulnerable to the orange-striped oakworm?</strong>
|
||||
A: Urban landscape trees are often clonal nursery stock with very low genetic variability. Dr. Graziosi used the example of Nuttall oaks on the UGA Athens campus — beautiful, high-quality trees that are essentially genetically identical, meaning the susceptibility of one tree is the susceptibility of all. Combined with urban heat island effects that accelerate insect development, this creates conditions favoring pest outbreaks.</p>
|
||||
<p><strong>Q: What is importation biological control, and how has it been applied to the emerald ash borer?</strong>
|
||||
A: Importation biological control involves studying the natural enemies that effectively control a pest in its native range and introducing them to the invaded region. USDA conducted risk assessments and introduced three specialist parasitoid wasp species from Asia to target EAB. Two species attack EAB larvae under the bark using ovipositors to locate them through vibrational cues, while the third parasitizes EAB eggs. These wasps are specialists that only attack EAB, ensuring they won't harm other insects.</p>
|
||||
<p><strong>Q: What is the significance of the white fringetree for emerald ash borer management in Georgia?</strong>
|
||||
A: The white fringetree, which belongs to the same family (Oleaceae) as ash, was discovered in 2014 to be an alternate host for the EAB. This is significant not only because it means another native plant species is at risk, but more importantly because white fringetree can serve as a population reservoir, allowing EAB to persist in an area even after all ash trees are gone. This has direct implications for long-term management strategies in Georgia.</p>
|
||||
<hr />
|
||||
<h3 id="additional-resources">Additional Resources<a class="headerlink" href="#additional-resources" title="Permanent link">¶</a></h3>
|
||||
<ul>
|
||||
<li>Dr. Graziosi referenced QR codes linking to UGA publications on EAB status and control in Georgia, the full insecticide protocol for EAB, and CMBS biology and management.</li>
|
||||
<li>The iTree tool suite for calculating ecosystem services and benefits of trees, and for right-tree-right-place selection, is available at <a href="https://www.itreetools.org">itreetools.org</a>.</li>
|
||||
<li>Submit sign-in sheets for CEU credit to gtbop@uga.edu or mail to the address on the sign-in sheet.</li>
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</ul>
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||||
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<p><em>Getting the Best of Pests (GTBOP) is a continuing education webinar series for pest management and Green Industry professionals, hosted by the University of Georgia Center for Urban Agriculture.</em></p>
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<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies
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<h1 id="youtube-description-graziosi-tree-pests">YouTube Description — Graziosi, Tree Pests<a class="headerlink" href="#youtube-description-graziosi-tree-pests" title="Permanent link">¶</a></h1>
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<h1 id="gtbop-youtube-description">GTBOP YouTube Description<a class="headerlink" href="#gtbop-youtube-description" title="Permanent link">¶</a></h1>
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<h2 id="understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies">Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies<a class="headerlink" href="#understanding-tree-pests-disease-interactions-invasive-threats-and-management-strategies" title="Permanent link">¶</a></h2>
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<p><em>Processed for UGA Center for Urban Agriculture / GTBOP Archives</em></p>
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<p><strong>Copy everything below this line into the YouTube description field:</strong></p>
|
||||
<hr />
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||||
<p>Understanding Tree Pests: Disease Interactions, Invasive Threats, and Management Strategies | GTBOP Webinar Series</p>
|
||||
<p>Dr. Ignazio Graziosi, Assistant Professor in the Warnell School of Forestry and Natural Resources at the University of Georgia, presents a framework for understanding tree pest damage through ecological interactions. Using the disease triangle and spiral of tree decline, he examines how the pest, host tree, and environment interact to produce damage — particularly in stressful urban settings.</p>
|
||||
<p>Three case studies illustrate different ecological scenarios: the emerald ash borer (EAB), a non-native pest devastating native ash; crapemyrtle bark scale (CMBS), a non-native pest on non-native crapemyrtle; and the orange-striped oakworm moth, a native pest on native oaks. For each, Dr. Graziosi explores host susceptibility, environmental factors, natural enemies, and chemical and biological control strategies, providing a practical decision-making framework for landscape professionals.</p>
|
||||
<p>Presented January 15, 2026 | Getting the Best of Pests (GTBOP) Webinar Series | Green & Commercial
|
||||
Hosted by the UGA Center for Urban Agriculture
|
||||
Moderator: Dr. Bodie Pennisi, UGA Horticulturist</p>
|
||||
<p>⏱️ TIMESTAMPS
|
||||
0:00 Introduction and speaker credentials
|
||||
1:28 The disease triangle: pest, tree, and environment
|
||||
3:02 The spiral of tree decline
|
||||
6:07 Native vs. non-native pest and tree interactions
|
||||
7:22 Example 1: Emerald ash borer (EAB) — overview
|
||||
8:23 EAB life cycle and damage symptoms
|
||||
10:48 EAB generation time and temperature effects
|
||||
11:57 EAB spread across North America and firewood
|
||||
13:47 EAB in Georgia and native ash species diversity
|
||||
15:26 White fringetree as alternate EAB host
|
||||
16:43 Global trade and non-native species introductions
|
||||
18:20 The invasion curve: detection, eradication, and control
|
||||
21:32 Why EAB is not a pest in Asia
|
||||
22:34 Chemical control methods for EAB
|
||||
23:57 Importation biological control: parasitoid wasps
|
||||
28:01 Native natural enemies and the goal of balance
|
||||
29:42 Example 2: Crapemyrtle bark scale (CMBS) — overview
|
||||
31:47 CMBS biology, life cycle, and overlapping generations
|
||||
33:47 CMBS invasion timeline and early detection
|
||||
35:02 CMBS and the invasion curve in Georgia
|
||||
36:06 CMBS host range expansion in North America
|
||||
36:42 Urban heat island effects on scales
|
||||
37:28 Chemical control options for CMBS
|
||||
38:31 Natural enemies: lady beetles and lacewings
|
||||
42:04 Balancing chemical and biological control for CMBS
|
||||
42:25 Example 3: Orange-striped oakworm moth — overview
|
||||
43:53 Oakworm life cycle and seasonal timing
|
||||
44:51 Why urban and clonal trees are vulnerable
|
||||
46:35 Natural enemies of the oakworm
|
||||
47:56 Control decisions: damage thresholds and Btk
|
||||
49:19 Presentation wrap-up and key takeaways
|
||||
50:01 Moderator comments on CMBS expansion in Georgia</p>
|
||||
<p>❓ Q&A HIGHLIGHTS</p>
|
||||
<p>Q: What is the disease triangle?
|
||||
A: Damage results from the interaction of the pest, the host tree, and the environment — not the pest alone.</p>
|
||||
<p>Q: How does firewood spread the emerald ash borer?
|
||||
A: Infested firewood was the primary pathway for EAB's rapid spread, closely matching the highway system and leading to the "Don't Move Firewood" campaign.</p>
|
||||
<p>Q: Why is trunk injection ineffective for crapemyrtle bark scale?
|
||||
A: Crapemyrtle absorbs systemic insecticides very slowly. Soil drench, soil injection, and foliar sprays are recommended instead.</p>
|
||||
<p>Q: When should you treat for orange-striped oakworm?
|
||||
A: The threshold is about 25% defoliation. Late-season defoliation is less harmful. Btk is effective against young larvae with minimal impact on natural enemies.</p>
|
||||
<p>📚 RESOURCES
|
||||
• Submit sign-in sheets for CEU credit: gtbop@uga.edu
|
||||
• iTree tools for calculating tree benefits: itreetools.org
|
||||
• QR codes for UGA extension publications on EAB and CMBS were shown during the presentation</p>
|
||||
<p>🔗 ABOUT GTBOP
|
||||
Getting the Best of Pests (GTBOP) is a continuing education webinar series for pest management and Green Industry professionals, hosted by the University of Georgia Center for Urban Agriculture.</p>
|
||||
<h1 id="treehealth-emeraldashborer-crapemyrtlebarkscale-pestmanagement-ipm-arboriculture-uga-gtbop-continuingeducation-urbanforestry-biologicalcontrol">TreeHealth #EmeraldAshBorer #CrapemyrtleBarkScale #PestManagement #IPM #Arboriculture #UGA #GTBOP #ContinuingEducation #UrbanForestry #BiologicalControl<a class="headerlink" href="#treehealth-emeraldashborer-crapemyrtlebarkscale-pestmanagement-ipm-arboriculture-uga-gtbop-continuingeducation-urbanforestry-biologicalcontrol" title="Permanent link">¶</a></h1>
|
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|
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<lastmod>2026-03-17</lastmod>
|
||||
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|
||||
<loc>https://docs.gtbop.com/green-commercial/2026-01-15-graziosi-tree-pests/activities/GTBOP_Quiz_2026-01-15_TreePests_Graziosi/</loc>
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<lastmod>2026-03-17</lastmod>
|
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|
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<lastmod>2026-03-17</lastmod>
|
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|
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<lastmod>2026-03-17</lastmod>
|
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||||
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