Bermudagrass Decline

Gaeumannomyces graminis var. graminis

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  • Bermudagrass decline is a root rot disease. Because the roots are affected, they will not be able to efficiently obtain water or nutrients from the soil, nor will they be able to store the products from photosynthesis. Symptoms observed on the leaves are the result of pathogen activity on the root system. The fungus does not attack leaves. Prolonged periods of rainfall are most conducive to this disease. Any stress placed on the turfgrass will encourage or worsen the disease. All warm-season turfgrasses can be affected. Initial symptoms of bermudagrass decline include yellow or light green chlorotic patches, 8 to 24 inches in diameter. Chlorotic leaf blades may develop next to green shoots at the margins of the diseased area. Roots will initially be thin and off-white in color with isolated black lesions. Entire plants may eventually die, resulting in irregular patches of thinning grass and, if not controlled, bare patches may develop.


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