Drive provides good activity on field bindweed, black medic, and clover, but has little activity on which weed?

Drive provides good activity on field bindweed, black medic, and clover, but has little activity on which weed?

• A. Goosegrass
• B. Crabgrass
• C. Dandelion
• D. Foxtail

Answer: (A)

Drive works well on certain broadleaf weeds because its active ingredient moves through the plant and disrupts growth in those species. Field bindweed, black medic, and clover are broadleaf weeds that respond to that mode of action, so you see good activity there. Goosegrass, however, is a grassy weed that quinclorac-based products like Drive don’t control effectively. Its physiology and tolerance to this chemistry mean the herbicide has little impact, so goosegrass remains largely unaffected. For goosegrass control in turf, a different product or a different management approach is needed.

Drive works well on certain broadleaf weeds because its active ingredient moves through the plant and disrupts growth in those species. Field bindweed, black medic, and clover are broadleaf weeds that respond to that mode of action, so you see good activity there. Goosegrass, however, is a grassy weed that quinclorac-based products like Drive don’t control effectively. Its physiology and tolerance to this chemistry mean the herbicide has little impact, so goosegrass remains largely unaffected. For goosegrass control in turf, a different product or a different management approach is needed.