Add Czarnota Weed Control review prompts Moodle activity

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-19 19:16:33 -04:00
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+# GTBOP Moodle Review Activities
+## Weed Control in the Landscape & Nursery — Dr. Mark Czarnota (November 18, 2021)
+
+**Source:** Corrected SRT (Stage 1) — GTBOP_Transcript_2021-11-18_WeedControl.srt (786 blocks)
+**Structural Reference:** Stage 2 Archive Package — GTBOP_Archive_Summary_2021-11-18_WeedControl.md
+**Review Tasks:** 6
+
+---
+
+### Review Task 1
+**Watch:** 4:23 – 6:40
+**Task:** List the six characteristics Dr. Czarnota identifies as predictors of weediness, then describe the specific real-world example he uses for the first characteristic.
+**Key Points to Identify:**
+- The six characteristics (vegetative reproduction, abundant seed production, rapid establishment, seed dormancy, adaptive traits, disturbed site colonization)
+- Yellow and purple nutsedge as the example of vegetative reproductive structures
+- Pigweed seed production numbers (5,000–10,000 seeds per plant)
+
+---
+
+### Review Task 2
+**Watch:** 15:44 – 18:06
+**Task:** Identify the four biological control methods Dr. Czarnota describes and note the specific target weed or pest for each. For one method, describe why it was discontinued.
+**Key Points to Identify:**
+- Grass carp for submerged aquatic weeds (8–10 per surface acre)
+- Goats for kudzu (followed by herbicide on regrowth)
+- Thistle weevil for musk thistle (larvae prevent seed development over 2–3 years)
+- DeVine bioherbicide for strangler vine in citrus (worked too well — eliminated the vine and left no host for the biocontrol agent)
+
+---
+
+### Review Task 3
+**Watch:** 21:07 – 23:43
+**Task:** Explain the key difference between how pre-emergent and post-emergent herbicides work, and identify the critical weather requirement for each type after application.
+**Key Points to Identify:**
+- Pre-emergent: applied before germination, needs 0.5–1 inch of rain to move into top quarter inch of soil
+- Post-emergent: applied after emergence, needs a dry period for leaf absorption
+- Glyphosate as the only broad-spectrum systemic (phloem-loaded) post-emergent herbicide
+
+---
+
+### Review Task 4
+**Watch:** 26:20 – 29:08
+**Task:** Describe the modes of action for glyphosate and the dinitroaniline herbicides. For glyphosate, identify the three amino acids affected and explain why this matters for mammalian safety.
+**Key Points to Identify:**
+- Glyphosate inhibits EPSP synthase, blocking production of tryptophan, phenylalanine, and tyrosine
+- The EPSP synthase pathway does not exist in animals — humans obtain these amino acids through diet
+- Dinitroanilines disrupt microtubule formation during cell division, preventing chromosome separation
+- Visual symptom of dinitroaniline overdose: club rooting
+
+---
+
+### Review Task 5
+**Watch:** 29:42 – 35:16
+**Task:** From the pre-emergent and post-emergent products Dr. Czarnota reviews, identify the two products he recommends most highly for landscape use and note their key advantages and any limitations.
+**Key Points to Identify:**
+- Dimension (dithiopyr): most underutilized; safe on turfgrasses, broad woody ornamentals, some perennials and annuals
+- Marengo (indaziflam): up to 16 weeks control; established woody ornamentals only; does not control nutsedge
+- Combination granular products (Snapshot, FreeHand) provide both pre-emergent control and oxyfluorfen burndown
+
+---
+
+### Review Task 6
+**Watch:** 36:40 – 39:30
+**Task:** List the common application errors Dr. Czarnota identifies that reduce herbicide effectiveness, and note his recommended application frequency for field versus container production.
+**Key Points to Identify:**
+- No rain after pre-emergent application (needs rain within 72 hours)
+- Rain immediately after post-emergent application
+- Poorly calibrated equipment
+- Wrong herbicide for the target weed
+- Applying pre-emergent after weeds have already germinated
+- Field: 2–4 applications/year; Containers: 4–6 applications/year
+
+---
+
+*Generated for UGA Center for Urban Agriculture / GTBOP Moodle Course Activities*
+*Source: Corrected SRT (Stage 1) — GTBOP_Transcript_2021-11-18_WeedControl.srt (786 blocks)*
+*Structural Reference: Stage 2 Archive Package*
@@ -26,6 +26,7 @@ tags:
 | 3 | [Extension Agent Version](platforms/ext-agent.md) | Complete |
 | 4 | [Quiz](activities/quiz.md) | Complete |
 | 4 | [Matching Exercises](activities/matching.md) | Complete |
+| 4 | [Review Prompts](activities/review-prompts.md) | Complete |
 | 5 | [Prose Transcript](prose-transcript.md) | Complete |
 | — | [Processing Log](processing-log.md) | Complete |