Herbicide resistance management in conservation-tillage soybean;
Andrew Price ( Auburn University), Charles Burmesteir ( Auburn University), Dale Monks ( Auburn University), Dennis Delaney ( Auburn University), Michael Patterson ( Auburn University) ($8000). The Project Manager's email is firstname.lastname@example.org.
Key Words: Soybean Production Management Systems, Conservation Tillage, Weed Control-Herbicide Resistance
Most row crop producers in Alabama have adopted some form of conservation-tillage and are challenged with controlling resistant Palmer amaranth or horseweed (marestail) in their crop rotation. Controlling resistant Palmer amaranth and horseweed within soybean is currently feasible due to effective preemergence and postemergence herbicide options, yet it can be a challenge due to lack of preemergence herbicide activation or poor postemergence activity due to dry conditions at time of application. Current Palmer amaranth recommendations throughout the Southeast and Mid-south are designed to reduce the seedbank. Because glyphosate resistance is increasingly a problem in Alabama, effective management requires recommendations in conservation-tillage systems on controlling problematic weeds. A field study will be conducted in glyphosate tolerant, glufosinate resistant, and conventional soybean. The study will be a factorial treatment arrangement consisting of three levels: winter cover crop (rye-present or absent), early season residual and postemergence herbicide system (glyphosate, glufosinate, or conventional herbicides applied EPOST, POST, sequential, or none).
This project is funded by Alabama Soybean Producers