On-farm management of herbicide resistant weeds;
Andrew Price ( Auburn University), Charles Burmesteir ( Auburn University), Dale Monks ( Auburn University), Dennis Delaney ( Auburn University), Michael Patterson ( Auburn University) ($7500). The Project Manager's email is delandp@auburn.edu.
Key Words: Weed Control, Weed Control-Herbicide Resistance
At least 20 counties in Alabama have either confirmed or suspected populations of glyphosate-resistant Palmer amaranth (pigweed). Managing glyphosate resistance will involve a systems approach to weed control, in order to limit yield loss and harvest problems from Palmer amaranth and other resistant weeds. In order to control resistant weeds and slow further resistance development to other herbicides and with other weeds, it is critical for producers to understand the mode of action for the herbicides that they are applying in order to properly alternate activity classes, and how best to use these different weed control methods.
The project’s approach will be:
• To develop and publish a sturdy "Quick Guide" dashboard-capable listing with information of the choices commonly available in Alabama. Herbicide classes and names will be color coded, so that producers can tell "at a glance" whether their choices will meet their management goals. Details will be limited for clarity, but enough so that a producer can decide whether to investigate the product and its label further; and
• On-farm trials will be established in fields with a history of glyphosate resistant Palmer amaranth in order to test and demonstrate season-long programs for control. After preplant weed burndown and soybean planting, at least three different preemergence and postemergence residual herbicide programs will be established with a minimum of three replications for each system. Control ratings of escaped Palmer amaranth and other weeds will be made after preemergence treatments, and again after postemergence treatments, as well as noting any soybean injury. Final counts of escaped pigweed will be made within each plot, with plants removed from the field before seed set.
This project is funded by Alabama Soybean Producers
Website is funded by the soybean checkoff
