Brown patch

[4] 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] While on taller cut grasses that are not wet for extended periods of time will begin to produce patches that can be several feet in diameter and may have a "frogeye" appearance.

[5] On a closer look at the grass leaf blades (usually on Tall Fescue) you maybe able to see tan to brown small, irregular shaped lesions.

[3] Brown patch is most common when night temperatures fail to drop below 68 °F and during extended periods of high humidity or prolonged leaf wetness.

[5] During the winter months the fungus will lie dormant in the grass tissue or soil and form into resting bodies called sclerotia.

Some of the management practice include reducing thatch, having adequate drainage, and removing dew during hot and humid weather.

Improve air circulation and avoid irrigation practices that will leave moisture on the grass blades for extended periods of time.