What plant symptoms are associated with Brown Patch?

Brown Patch is a common turf disease caused by the fungus Rhizoctonia solani, and it primarily affects cool-season grasses during warm, humid conditions. The defining symptoms of Brown Patch include irregularly shaped gray or tan lesions on the leaves. These lesions typically start as small, dark brown spots that can expand, giving them an irregular shape. Eventually, the affected areas can coalesce, leading to larger patches of dead grass, which is characteristic of this fungus's infection pattern.

This specific symptomatology makes it easier for lawn care professionals and gardeners to identify the ailment accurately. In contrast, the other symptoms listed do not align with the typical presentation of Brown Patch. For instance, dark green leaves with no lesions would suggest a healthy plant, while bright yellow foliage with minimal lesions could indicate other types of stress or disease, such as nutrient deficiency or root issues, rather than Brown Patch. Uniform brown discoloration across the lawn might suggest a complex of problems or another disease entirely but doesn't reflect the distinct characteristics of Brown Patch lesions. Therefore, the identification of irregularly shaped gray or tan lesions is key in diagnosing Brown Patch disease in turfgrasses.