Awards issued prior to january 20, 2025, were funded under previous administrations and may not reflect the priorities and policies of the current administration.** this is a multi-state,…

Awards issued prior to january 20, 2025, were funded under previous administrations and may not reflect the priorities and policies of the current administration.** this is a multi-state, multi-institution collaborative applied research (single-function) project for applied research and development program (ardp). The project aims to improve phosphine resistance management in insect pest populations in food facilities. Stakeholders often inquire for help after resistance has already become a problem, and there are no comprehensive guidelines for steps to take with phosphine resistant populations in the US. IT is clear that stakeholders require advance warning that resistance is becoming a problem, and they need recommended, empirically-driven guidance to support resistance management programs. We aim to develop this information for stakeholders by: 1) optimizing an early, warning phosphine resistance screening tool based on recessive allele frequency; 2) conducting a survey of key great plains food facilities in corn-, rice-, and wheat-producing states for phosphine resistance; 3) validating and implementing a diversified suite of integrated pestmanagement tactics in bulk storage and processing facilities to manage phosphine resistance; and 4) engaging stakeholders with a suite of interaction strategies to communicate the importance of screening for resistance, what to do if resistance is found, and associated costs. Our project includes personnel representing kansas, nebraska, and arkansas, and will thus help protect the US's role as the breadbasket of the world at a time when the world faces a global food crisis, supporting USDA strategic goal 2 and 4, and helping to reduce health risks and environmental effects from pests and management strategies.