Brown Patch & Large Patch Diseases of Lawns

Joey Williamson, Ph.D.
Home & Garden Information Center

Brown patch of fescue and large patch of warm-season turfgrasses have become the most common diseases of residential lawns. Large patch of centipedegrass, St. Augustinegrass, zoysiagrass and Bermudagrass is most active in the fall and late spring, whereas brown patch of fescue lawns begins with warm temperatures of late spring and continues throughout the summer months.

Brown Patch
Brown patch of fescue turfgrass
Joey Williamson ©2011 HGIC, Clemson Extension

These diseases will appear as small circular brown areas in the lawn and quickly spread to several feet in diameter. The infected areas often have a smoky-brown halo around the outer portion of the spots. Proper cultural conditions for the lawn coupled with fungicide treatments will help reduce disease symptoms. To learn more about how to best control these diseases, please see HGIC 2150, Brown Patch & Large Patch Diseases of Lawns.

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This information is supplied with the understanding that no discrimination is intended and no endorsement by the Clemson University Cooperative Extension Service is implied. All recommendations are for South Carolina conditions and may not apply to other areas. Use pesticides only according to the directions on the label. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Follow all directions, precautions and restrictions that are listed.