Lawn - Knowledgebase Question

Las Vegas, NV
Question by MPearlG
July 20, 2007
I keep having these brown spots that appear in my lawn. I just get one patch cleaned up and another appears. I put down some stuff that was supposed to take care of it, but I am still seeing these brown spots. The grass dies. I reseed. Another place turns brown. What gives? Thanks

Answer from NGA
July 20, 2007


It's really difficult to diagnose lawn problems without knowing the cultural care they're getting, but here's my best guess: Brown Patch. Brown Patch is most common to Bermuda, Kentucky Bluegrass, Centipede Grass, Bent Grass, St. Augustine, and ryegrasses in regions with high humidity and/or shade. Brown patch commonly starts as a small spot and can quickly spread outwards in a circular or horseshoe pattern up to a couple of feet wide. Often times, while expanding outwards, the inside of the circle will recover, leaving the brown areas resembling a smoke-ring. The best prevention for brown patch is to aerate often, reduce shade to affected areas, and follow a fertilization schedule. The most common fungicides used on Brown Patch are: benomyl or chlorothalonil. Be sure to apply according to label directions. Good luck with your lawn!

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