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Pink Snow Mould

​Description

Pink Snow Mould (Microdochium nivale), the fungus that causes pink snow mold produces roughly circular bleached patches up to 60 cm in diameter. Often, the mycelium of the fungus is readily visible. In contrast to gray snow mold, however, a pinkish cast to the symptomatic area might be observed under wet conditions. This disease can become severe when turf is subjected to prolonged periods of cool, wet weather from early autumn to late spring, and does not require snow cover to develop. The fungus Microdochium nivalesurvives unfavorable periods as dormant mycelium in infected plants and plant debris. As conditions improve for fungal growth, the fungus may begin to infect plants with little symptom development. Wet weather conditions with temperatures around 60°F will promote rapid spread of the disease. Dry, warm weather causes the fungus to revert to its dormant state. The fungus can be transmitted throughout the year on equipment, people, animals, wind or water.