Controlling broadleaf weeds after the drought – Turfgrass Science at Purdue University

Controlling broadleaf weeds after the drought

Now that the lawn and weeds have greened-up from the recent rains, broadleaf herbicides should be effective yet this fall. Though these herbicides work faster when the plants are actively growing, these herbicides will still work as long as the plants are green and photosynthesizing. Therefore, applications into November will work, albeit slower. You may not even see any effect this year, but weeds will die over the winter. However, herbicides that contain carfentrazone (FMC’s Quicksilver, PBI Gordons’ Powerzone and Speedzone) will still give a response in 7 to 10 days even when applied in late October or early November. To maximize success with any broadleaf herbicide, try to apply on a dry, warm (>550F), sunny day to maximize effect. If you have problems with winter annual broadleaf weeds such as common chickweed, it makes more sense to apply a broadleaf herbicide as late as possible in the fall to control most of these late-germinating weeds. This would be especially important on fall seedings that may be struggling because of weed cover right now. More information on late fall broadleaf weed control can be found in Turf Tips from Aug. 9, 2004.

 Categories:

Share This Article
Disclaimer: Reference to products is not intended to be an endorsement to the exclusion of others which may have similar uses. Any person using products listed in these articles assumes full responsibility for their use in accordance with current directions of the manufacturer.
Turfgrass Science at Purdue University - Horticulture & Landscape Architecture, 625 Agriculture Mall, West Lafayette, IN 47907

© 2024 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Turfgrass Science at Purdue University

If you have trouble accessing this page because of a disability, please contact Turfgrass Science at Purdue University at ashbreed@purdue.edu | Accessibility Resources