Evaluation of Preventative Pre- and Tank-Mixed Fungicide Applications for Control of Gray Snow Mold Diseases in Windsor, VT, 2024 to 2025

Gray snow mold, caused by Typhula incarnata, is a destructive winter disease affecting cool-season turfgrasses, typically developing under prolonged snow cover and persistently moist, cool conditions. Following snowmelt, the disease appears as large, straw-colored or matted patches, often accompanied by gray mycelium and pink sclerotia embedded within affected tissues. This study assessed the efficacy of various fungicidal treatments on a mixed Agrostis stolonifera (creeping bentgrass) and Poa annua (annual bluegrass) during the 2024 to 2025 winter season in Vermont. The results offer updated, practical recommendations for turf managers aiming to minimize damage and improve disease management strategies under typical northeastern U.S. winter conditions.