Common Name: yellow patch
Scientific Name: Rhizoctonia cerealis
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Yellow patch is a common disease of cool-season turfgrasses (bentgrasses, bluegrasses, fescues) during the fall, winter, and spring. Symptoms appear as irregular patches or rings up to 3 feet in diameter that are yellow in color. Multiple rings or patches may coalesce to form large, irregularly-shaped areas. Individual plants exhibit a yellow dieback of leaves or blighting of entire plants. No distinct lesions are evident on the affected plants, and the pathogen does not produce mycelium or other signs. Recovery from yellow patch can be very slow because it occurs at a time of the year when the turf is growing slowly. |