How can I tell if my lawn has Brown Patch?

How can I tell if my lawn has Brown Patch?

Q: How can I tell if my lawn has Brown Patch? Last year my neighbors said that was the problem, but I am not sure. Will it return this fall?

A: Brown patch usually appears as circular or irregular shaped patches of circular or irregular shaped patches of light brown, thinned grass. Your grass can be yellowish and may have a smoke-ring on outside edge – especially in the morning hours on cool season grasses; turf in the center of the ring may recover, leaving a ring effect; spreads rapidly; patches up to several yards in diameter; leaf sheaths become rotted and a gentle tug on the leaf blade easily separates from the runner; usually does not discolor roots; fungus attacks the base of the leaf sheath. Most fungicides will do an effective job if used on a preventative basis. It is hard to destroy the fungus once it is extablished on the turfgrass. Fungicides containing Azoxystrobin (Heritage), Myclobutinil(Eagle, Immunox) or PCNB (Terraclor, Turfcide) give good to excellent results.

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