Pink Snow Mold

Microdochium nivale

Pink Snow Mold stealthily develops underneath the cover of snow in colder climates. Also known as Fusarium Patch, this lawn disease attacks most types of cool-season grass in the northern part of the United States.




One of the most common signs of Pink Snow Mold is the water-soaked yellow, tan or salmon patches ranging from 1 to 8 inches in diameter. Pale pink edges surround the patches where lawn fungus spores are produced in white or salmon-colored reproductive structures found on dead tissue. If there is no snow cover present, this lawn disease is called Microdochium Patch.

Life Cycle

A Pink Snow Mold infection can occur only if all of the following conditions are present: 1. Pathogen: Microdochium nivale lawn fungus 2. Host: Most types of cool-season grass 3. Environment: Unfrozen soils in cold, wet climates with temperatures less than 60°F

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Because you can't change your environment, the best way to control Pink Snow Mold is to create conditions that will foster a healthy lawn. Not only will this make your yard unfavorable for Pink Snow Mold growth, but it will also lower your risk of extensive damage should the lawn disease develop—plus you'll have the type of lawn you'll want to live on. For Pink Snow Mold control and lawn fungus treatment, TruGreen® recommends the following cultural control tips: • Regularly mow grass until your lawn goes dormant, with the final mowing of the season slightly lower than normal • Avoid heavy applications of fertilizers with water-soluble nitrogen in late fall, prior to dormancy • Apply high levels of potash, and maintain a balanced fertility program • Reduce thatch with core aeration • Rake affected areas in the spring to reduce the amount of matting


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