Typhula blight, also known as gray snow mold or speckled snow mold, is most severe under extended periods of deep snow that covers a wet turfgrass on unfrozen soil. The pathogen Typhula incarnata is most active when temperatures are 1-2 C. Grayish to straw colored circular patches ranging from 2.5 cm to 1 meter in diameter appear at snow melt. A grayish mycelium may be present infected turf, which gives it the grayish or speckled look.
Covering greens to protect them from winter injury (see Winter Injury publication) are often used in the northern temperate regions. Covers can be broken down into two major categories permeable and impermeable. Permeable covers allow for air, light, and water to penetrate the cover. Permeable covers are used to protect greens from wind and sun exposure (desiccation). In addition they are often used in the spring to promote spring green-up and where turf has been damaged used to help in turf recovery.
Frost is a common reason for morning tee time delay. The reason for the delays is the damage that can occur from foot or equipment traffic to the turf when frost is present. Generally speaking, nice fall golfing days and frost go hand-in-hand. With more frost days expected, this is a good time to look at the conditions favorable for frost.