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Brown patches on the lawn can pop up for a variety of reasons. Here are a few of the main ones: Fungal Diseases: One of the usual suspects is a brown patch fungus, especially when the weather is ...
It is common in sodded lawns, rapidly growing lawns, and lawns with layered soil (3). The pathogen produces circular patches of bald spots that are tan or yellow in color (12). These patches are about 5 to 10 cm in diameter, but can grow to be about 1 meter in diameter. Eventually, as the infected turf dies, the spots turn brown.
Brown patch symptoms differ depending on the various maintenance practices performed on the turfgrass (mowing height, fertilizer, watering, etc.) Symptoms on turfgrasses that are wet for extended periods and are closely mowed will produce a distinctive gray-purplish bordered ring "smoke-ring" that is up to 50 cm in diameter. [3]
The rings turn from yellow to light or reddish brown as the disease progresses. [5] The disease is most noticeable on putting greens and commonly occurs in the spring with rising temperatures. [4] [6] Brown ring patch is similar to other Rhizoctonia species, but appears to infect upper roots, crowns, and stems as well as foliage of individual ...
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On fine textured and close-cut turf, the disease appears as round, brown to straw-colored and somewhat sunken spots approximately the size of a silver dollar. In coarse textured grasses maintained at taller cutting heights, the dead spots are larger and more diffuse. Spots are often seen in clusters.
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