Attacks any turf grass, but primarily bluegrass and centipede grass in the summer and fall. Causes irregular sized tan, brown or reddish-brown patches of grass ranging in size from several inches to several yards. Can kill turf if left untreated.
Anthracnose appears in the lawn as irregular patches of brown grass, 2 to 12 inches (5 – 30 cm) in diameter. Brown or tan blotches are present on the leaves. Black, spiky fruiting structures (acervuli) occur on dead grass blades and are key to identifying this disease. The older growth is affected in advance of newly developed leaves. The new growth may remain green.