Arkansas farmers identify multiple-herbicide resistant Palmer amaranth and preserving weed control tools as high priorities. Metolachlor, one of the most widely used residual herbicides, could be the next tool lost to herbicide resistance, with reduced Palmer amaranth control already observed in some fields. This project seeks to collect initial data to determine the geographic occurrence and level of metolachlor resistance in Palmer amaranth and the role of soil dissipation in reduced metolachlor efficacy. Continuous and repeated soil exposure may evolve accelerated dissipation, creating a cascade of shortened residual herbicidal activity, low-dose selection for tolerant plants. Data from this study identifies risk factors and builds tools that support farmers in combating metolachlor resistance at the field scale.Key Benefactors: farmers, agronomists, extension agents
The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.