What temperature range is commonly associated with the occurrence of Gray Snow Mold?

Gray Snow Mold, caused by the pathogen Typhula incarnata, typically occurs under specific environmental conditions, primarily when temperatures are cool and moist. The occurrence of this disease is commonly associated with temperatures in the range of 32 to 45 degrees Fahrenheit. This is significant because these temperatures create the ideal conditions for the pathogen to thrive, particularly after snow cover has melted but the ground remains cold and wet.

In this temperature range, the grass is often under stress from conditions such as low light and moisture, making it more susceptible to infection. Cool-season grasses are particularly vulnerable because they remain active for longer in cooler temperatures, which allows the mold to develop and damage the turf if conditions remain favorable for the fungus to proliferate.

Understanding this temperature range helps in managing and preventing the disease effectively, as implementing cultural practices such as improved drainage, appropriate mowing height, and timely application of fungicides can be critical when conditions are right for Gray Snow Mold development.