# 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

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### 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)

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### 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

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### 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

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*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*