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Large Patch / Brown Patch

Large patch is a fungal disease that can affect zoysiagrass and St. Augustinegrass lawns. It shows up as round, discolored patches that expand over time. The borders of the patches are sometimes orange, and the centers appear brown and sunken. It's also known as brown patch or rhizoctonia blight. --"Large Patch Disease", Gardening in a Minute

 

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