Small, straw-colored patches no greater than 3 inches in diameter indicate which disease?

The presence of small, straw-colored patches no greater than 3 inches in diameter is characteristic of dollar spot disease. This fungal disease primarily affects turf grasses and is often seen in areas that are maintained at a lower mowing height and under conditions of stress, such as drought or inadequate fertilization.

Dollar spot manifests as small, circular patches that can appear as light tan or straw-colored, making them a significant indicator of the disease. The size and color of the patches help distinguish it from other turf diseases. For instance, brown patch typically presents larger, irregular patches that can be more extensive than 3 inches, while fusarium patch generally shows more defined borders and can take on a different color and texture.

Understanding the specific symptoms associated with dollar spot is crucial for accurate diagnosis and effective treatment. By recognizing these signs, turf managers can implement timely interventions to mitigate the disease's impact on the grass.