Brown patch shows up as large irregular circular areas of brown grass. The outer edges of the affected areas are orange-brown in color and the blades can easily be pulled from the runners. This fungus will generally occur in the same areas of the lawn each year. The spores become active in the fall as temperatures drop and there is excessive moisture available for the fungus to develop. Scarring from the damage will usually remain until new spring growth fills in the area. Our regular program will spot-treat up to 10% of your yard at no additional charge.
Brown Patch: The name is not very descriptive of the varied symptom expression caused by Rhizoctonia spp. on turfgrass. Symptoms differ on cool- and warm-season grasses and vary depending on environmental conditions and cultural practices. Grass affected by brown patch generally will exhibit circular or irregular patches of light brown, thinned grass. On cool-season grasses (bent, rye and fescue) during periods of warm, humid weather, a darkened border or smoke ring may develop at the outer margin of the patches. The smoke-ring symptom is not reliable for diagnosis.