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Problem:
White Patch

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Problem Info

Patches of off-white turf, sometimes with a salmon-pink border, appear in the lawn. They can be up to 15 inches across and may merge to form large irregular damaged areas. Affected turf becomes matted, giving patches a sunken appearance. A weblike white growth may be noticeable. Close examination reveals small, gray-white mushrooms. White patch is most common in tall fescue, but can also infect fine fescue and Kentucky bluegrass. It is especially prevalent during hot, wet weather toward the end of summer.

Analysis

This plant disease is caused by a fungus infection, usually Melanotus phillipsi or Trechispora species, and it is most common in tall fescue. White patch can also infect fine fescue and Kentucky bluegrass. It is especially prevalent during hot, wet weather toward the end of summer.

Solution Advice

No specific control program is available for white patch. Weakened lawns in exposed, sunny sites are most susceptible, so proper planting and maintenance -including regular mowing, irrigation, and applications of fertilizer-should limit damage. Lawns often recover on their own with the return of cooler weather.

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