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