Multiple herbicide resistant pigweeds are increasing management challenge to Kansas soybean producers. Declining herbicide options coupled with ever-increasing reports of herbicide-resistant pigweed populations necessitate the evaluation and implementation of alternative ecological-based strategies for pigweed management. This project will focus on understanding the seed retention ability of Palmer amaranth at soybean harvest in Kansas fields and will also determine the efficacy of integrating harvest weed seed destructor (HWSD) technique on Palmer amaranth seedbank dynamics. Information generated through this project will help in developing and integrated weed management (IWM) strategies for mitigating/reducing herbicide resistance in Palmer amaranth populations in Kansas.

1. Determine the Palmer amaranth seed retention at soybean maturity in Kansas.
2. Evaluate the effect of harvest weed seed destructor (HWSD) on Palmer amaranth seedbank dynamics in Kansas soybean fields.

This project will help in quantifying the seed retention ability of Palmer amaranth at soybean harvest in Kansas. This
information is quite important for implementation of harvest weed seed control technologies (including chaff lining and HWSD). Through this project, we will develop IWM-based tactics for weed control that go beyond herbicides and could aid in improving the long-term sustainability and economic viability of Kansas soybean-based cropping systems.

This project will help in quantifying the seed retention ability of Palmer amaranth at soybean harvest in Kansas. This
information is quite important for implementation of harvest weed seed control technologies (including chaff lining and HWSD). The project will also help in demonstrating soybean producers on the weed seed kill efficacy of Redekop Seed Destructor. If successful, this new IWM tactic can be widely adopted by producers and diverse stakeholders in Kansas, facing the ever-increasing challenges with multiple HR pigweeds.