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# GTBOP Moodle Matching Exercises

## 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 Exercises: 3 Types: Product-Ingredient, Timing-Practice, Species ID / Concept Matching

### Matching Exercise 1: Herbicide Products and Their Active Ingredients

Timestamp Reference: 25:16 – 35:16 (primary coverage area) Type: Product-Ingredient

Instructions: Match each trade name in Column A with its active ingredient in Column B.

# | Column A |  | Column B
--- | --- | --- | ---
1 | Dimension |  | a) isoxaben + trifluralin
2 | Marengo |  | b) dithiopyr
3 | BroadStar |  | c) clethodim
4 | Snapshot |  | d) flumioxazin
5 | Envoy |  | e) quinclorac
6 | Drive |  | f) indaziflam
7 | Treflan |  | g) halosulfuron
8 | SedgeHammer |  | h) trifluralin

Answer Key: 1 → b, 2 → f, 3 → d, 4 → a, 5 → c, 6 → e, 7 → h, 8 → g

Source in transcript: Trade name/active ingredient pairings discussed across blocks 391–530 (pre-emergent and post-emergent product sections) and blocks 710–720 (Q&A on Drive/quinclorac)

### Matching Exercise 2: Herbicide Application Timing and Practice

Timestamp Reference: 21:07 – 23:43 and 36:40 – 39:30 Type: Timing-Practice

Instructions: Match each herbicide application scenario in Column A with the correct practice or outcome described by Dr. Czarnota in Column B.

# | Column A |  | Column B
--- | --- | --- | ---
1 | Pre-emergent herbicide applied with no rain for two weeks |  | a) Product is inactivated immediately upon soil contact
2 | Post-emergent herbicide applied just before a rainstorm |  | b) Reduced control; product needs 0.5–1 inch of rain within 72 hours to activate
3 | Glyphosate sprayed onto bare soil |  | c) Apply at 25–50% solution using a wick or sponge applicator
4 | Glyphosate used for stump treatment |  | d) Reduced effectiveness; product needs a dry period to be absorbed through leaves
5 | Pre-emergent application in Georgia |  | e) Apply at 50–100% solution, paint directly onto cut surface
6 | Glyphosate applied by wicking onto target weeds |  | f) Apply in January–February before spring weed germination

Answer Key: 1 → b, 2 → d, 3 → a, 4 → e, 5 → f, 6 → c

Source in transcript: Pre-emergent/post-emergent timing discussed in blocks 352–385; glyphosate application rates and methods in blocks 640–680; Georgia timing recommendations in blocks 586–590

### Matching Exercise 3: Weed Control Methods and Their Targets

Timestamp Reference: 15:44 – 18:06 and 44:54 – 48:55 Type: Species ID / Control Method

Instructions: Match each weed problem or pest target in Column A with the control method or product recommended by Dr. Czarnota in Column B.

# | Column A |  | Column B
--- | --- | --- | ---
1 | Submerged aquatic weeds in a small pond |  | a) Clethodim (Envoy)
2 | Kudzu on a fenced area |  | b) Thistle weevil larvae
3 | Musk thistle seed production |  | c) Drive (quinclorac)
4 | Bermudagrass creeping into ornamental beds |  | d) Atrazine (2 applications at 1 qt/acre)
5 | Torpedograss in ornamental plantings |  | e) Grass carp (8–10 per surface acre)
6 | Virginia buttonweed in turfgrass |  | f) Goats followed by herbicide on regrowth
7 | Marchantia in propagation houses |  | g) Sandea (halosulfuron)
8 | Yellow nutsedge in landscape beds |  | h) Reduce watering frequency; pre-emergent granulars

Answer Key: 1 → e, 2 → f, 3 → b, 4 → a, 5 → c, 6 → d, 7 → h, 8 → g

Source in transcript: Biological controls in blocks 260–298; Marchantia in blocks 118–137; bermudagrass Q&A in blocks 740–762; torpedograss Q&A in blocks 710–720; Virginia buttonweed Q&A in blocks 722–738; nutsedge products in blocks 399–401 and 520–525

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