Glyphosate-resistant weeds such as waterhemp and Palmer amaranth are on the rise in the Midwest. It is imperative to understand how they develop glyphosate resistance, and find alternative methods for their control. Research has shown that glyphosate efficacy is affected by resistance to soil microbes and this role of microbes is striking. In the absence of key soil microbes, the efficacy of glyphosate can be reduced by an order of magnitude. Project objectives include efforts to manage glyphosate resistance by understanding the link among glyphosate activity, soil microbial activity and resistance; perform field tests and hold field days demonstrating practical management options for glyphosate resistant weeds.

Key Benefactors:
farmers, agronomists, ag retailers, applicators, extension specialists