Kentucky bluegrass is the primary, but not the only, host. Fescue, ryegrass, bentgrass, and bermudagrass have similar leaf spots and crown rots caused by other Drechslera species. Melting-out was first reported in the United States by Drechsler in the Madison, Wisconsin area in 1922. This disease has two phases, the leaf spot phase and the crown and root rot, or melting-out, phase. Leaf spots occur during cool, humid weather in the spring and fall.
Older leaves are more susceptible.
They may be surrounded by a yellow ring. The spots grow to an oval. The centers die, turning light brown to almost white. On a few species, these fungi can cause a net-like pattern of brown streaks and spots. Spots may occur on leaves, sheathes, and stems.