Problem: Clover Mites
Bryobia praetiosa These pests, related to spiders, are found throughout the United States. They feed and reproduce on clover, grass, and other plants. They are most active in the spring and fall and on warm winter days. The mites lay eggs that hatch in the fall. Lawn damage is usually done in late winter or spring, until about May. Activity ceases when temperatures rise above 85°F. Light damage appears as silver streaks on grass blades. Heavier damage causes blades to dry out and die. They may enter homes in such numbers that they are a nuisance.
Clover mites prefer heavily fertilized lawns. To discourage them, don''t use more fertilizer than is necessary.