May 2, 2014

Herbicide Classification Chart Available

Working with the Delaware Soybean Board and the United Soybean Board, a herbicide classification chart is available at:
http://extension.udel.edu/ag/weed-science/weed-management-guides/

This chart groups herbicides by mode of action and site group numbers that are printed on containers and labels. The chart is designed to help diversify herbicide use by rotating effective herbicides with different sites of action to delay the development of herbicide resistance. The chart provides the number of resistant weed species in the US to each site of action, which highlight those herbicides for which we already have wide-spread resistance.

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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.