Assessment of Preventive Pre- and Tank-Mixed Fungicide Treatments for Managing Pink and Gray Snow Mold on Fairway-Height Mixed Cool-Season Turfgrasses in Bretton Woods, NH, 2024 to 2025

Pink and gray snow mold, caused by Microdochium nivale and Typhula incarnata, respectively, are significant turfgrass diseases that typically develop under prolonged snow cover and cool, moist conditions. Pink snow mold appears as small, reddish-brown patches with pink margins, whereas gray snow mold produces large, matted, straw-colored patches following snowmelt. The diseases differ in mycelial color and structural characteristics, including the presence or absence of sclerotia, aiding in accurate diagnosis. This study, conducted during the 2024 to 2025 season in New Hampshire, evaluated the efficacy of various preventive fungicide treatments on a fairway-height mixed stand of Agrostis stolonifera, Poa pratensis, and P. annua. Disease severity and turf quality were assessed to identify the most effective management strategies. The findings provide updated, practical guidance for golf course superintendents managing snow molds in cool-season turf.