Rutgers University | New Jersey Agricultural Experiment Station | Pesticide User Responsibility

May 10, 2013

Apply Residual Herbicides as Close to Planting as Possible

By Mark VanGessel, Extension Weed Specialist; mjv@udel.edu

Preemergence herbicides will provide a period of residual weed control, based on rate and incorporation. Typically we can expect 3 to 5 weeks of residual control in most situations. So if our preemergence herbicide application is made 3 to 4 weeks before planting, we can expect weeds starting to emerge shortly after planting and a need for a postemergence herbicide application 2 to 3 weeks after planting. On the other hand, if preemergence herbicides are made at planting, they will provide enough residual control to allow postemergence application closer to canopy closure.

Source: Read More from Weekly Crop Update

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Filed Under: Commercial Ag Updates
About Mark VanGessel

Dr. Mark VanGessel is an Extension Specialist and Professor in Weed/Crop Management at the University of Delaware.

This is an archived post. For up-to-date recommendations visit the Weekly Crop Update @ http://extension.udel.edu/weeklycropupdate/

Remember: The label is a legally-­binding contract between the user and the manufacturer. The user must follow all rates and restrictions as per label directions. The use of any pesticide inconsistent with the label directions is a violation of Federal law.