No. 1 Article 3/March 26, 2010

Corn and Soybean Herbicide Efficacy Tables

For many decades, the weed science program at the University of Illinois published herbicide efficacy ratings for corn and soybean herbicides in the Illinois Agricultural Pest Management Handbook. Although the 2008 volume represented the final edition of that handbook, we continue to evaluate many herbicides and herbicide combinations on multiple weed species across much of Illinois. The two tables accompanying this article continue the tradition of efficacy ratings for corn herbicides (Table 1) and soybean herbicides (Table 2), albeit in a new format. The rating scale and list of weed species remain virtually unchanged, while several new products or product names appear in the leftmost columns of each table; other products no longer appear. We hope you continue to find this type of information useful as you plan your weed management programs for 2010.--Aaron Hager

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