From a distance, affected grass appears unthrifty and has a yellow or bronze cast. Affected turf may wilt rapidly during midday and require frequent watering. Individual plants will turn yellow before dying.
Susceptible species: Common in Bentgrass and annual bluegrass, may also occur in bermudagrass, creeping fescue, and centipede.
Favorable conditions: Favors high humidity and temperatures above 80°F.
Chemical control: Preventative applications when anthracnose is known to exist or is common. Applications can begin when soils are warm, in mid to late spring. Preventive chemical fungicides are far more effective than curative applications.
Photo credits: Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Cesar Calderon, Cesar Calderon Pathology Collection, USDA APHIS PPQ, Bugwood.org