Lawn Diseases

Brown Patch

Brown Patch
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Attacks fescues, bluegrass, centipede-grass, rye-grass, St. Augustine, bent and zoysaiagrass during the spring and fall. Causes small (silver dollar sized) spots of tan/brown. These spots can eventually merge to infect large areas.

Large brown-patch is nocturnal in its habits and thrives
best during hot, muggy nights. It makes its appearance in circular, smokylooking spots six to eight inches in diameter. The grass in these spots have
at first a cooked appearance as if scalded with hot water. A close examination reveals a fine cobwebby growth on the outer margins of the spots.
Given a few hours of hot sunshine, the spots turn brown, hence the name "brown-patch." If no remedy is applied and the weather is favorable, some of these spots may spread in the course of a few nights over an entire green.