Winter Grain Mite
Winter Grain Mite
Photo courtesy of Oklahoma State University
Winter grain mites are very small, spider-like insects with eight reddish-orange legs. Young mites have a reddish-orange body that turns to a black color as the mites mature. They also have a red spot on their hind area.
Damage
Mites damage turf by piercing leaf blades and removing plant juices. The affected grass looks “silvered” and damaged areas do not green up in spring. Injury may be confused with frost damage or winter desiccation. Winter grain mites do their damage during winter months, as their name implies. Their populations peak in February to March. Kentucky bluegrass, perennial rye grass and fescues are all subject to winter grain mite damage.