What is a classic symptom of brown patch disease?

Brown patch disease is a common lawn disease primarily affecting cool-season grasses, and it is characterized by specific symptoms that help in its identification. One of the classic symptoms is the appearance of grayish mycelium on the grass blades, typically observed during wet or humid conditions. This mycelium can give a cobweb-like appearance, which is indicative of fungal activity. Along with this, the grass in the affected areas starts to die off, resulting in patches that can severely impact lawn aesthetics and health.

This symptom is significant because the mycelium is a clear sign of the pathogen's presence, confirming the diagnosis of brown patch disease. The browning and dying of the grass within the patches, along with the visible mycelia, allow for accurate identification and proper management practices to be implemented before the disease spreads further. Other symptoms, like yellowing leaves or browning at the edges, may indicate different issues or stressors affecting the turf and are not definitive indicators of brown patch disease.