** AWARDS ISSUED PRIOR TO JANUARY 20, 2025, WERE FUNDED UNDER PREVIOUS ADMINISTRATIONS AND MAY NOT REFLECT THE PRIORITIES AND POLICIES OF THE CURRENT ADMINISTRATION.** DOLLAR SPOT IS ONE OF THE MOST IMPORTANT TURF DISEASES ACROSS THE WORLD NECESSITATING FREQUENT FUNGICIDE APPLICATIONS FOR CONTROL ON GOLF COURSES. DESPITE THIS IMPORTANCE, VERY LITTLE IS KNOWN ABOUT THE PATHOGEN POPULATION FROM A GENETICS LEVEL. IN THIS PROJECT WE AIM TO UNDERSTAND THE GENETIC DIVERSITY OF THIS PATHOGEN ACROSS A TYPICAL GOLF COURSE WITH THE HOPES OF DEVELOPING A GREATER UNDERSTANDING OF THE IMPACT OF OUR CURRENT CONTROL METHODS. FURTHERMORE, WE WILL GATHER AN UPDATED VIEW OF FUNGICIDE INSENSITIVITY IN THE NORTHEAST US AND INVESTIGATE THE GENETICS UNDERLYING THESE RESISTANT POPULATIONS. WE WILL DO THIS BY SAMPLING NATIVE PATHOGEN POPULATIONS FROM GOLF COURSES AND COMPARE THE GENETICS OF THESE PATHOGENS TO PREVIOUSLY ISOLATED PATHOGENS FROM ~14 YEARS AGO. BY DOING SO, WE CAN IDENTIFY HOW THE PATHOGEN POPULATION HAS CHANGED OVER TIME, WHILE CORRELATING THESE CHANGES TO HISTORICAL MANAGEMENT PRACTICES. THESE RESULTS WILL BE DIRECTLY INFORMATIVE TO GOLF COURSE SUPERINTENDENTS WHO ARE MANAGING THESE DISEASES, BUT ALSO PROVIDE CRITICAL INFORMATION FOR SCIENTISTS INVESTIGATING FUNGICIDE INSENSITIVITY AND FUNGAL PATHOGEN POPULATION BIOLOGY ACROSS MANY DIFFERENT CROPS AND SYSTEMS.