How can you identify dollar spot disease on a lawn?

The identification of dollar spot disease is characterized primarily by the appearance of small, round, sunken patches of dead grass. This fungal disease often manifests as tan or straw-colored patches that can be around the size of a silver dollar, which is how it gets its name. These patches are typically surrounded by healthy grass, creating a distinctive visual contrast. The sunken appearance occurs because the fungus causes the grass leaves to die off, resulting in a depressed area.

This fungal disease thrives in conditions of high humidity and lower nitrogen levels, and it specifically affects certain types of turfgrass. The symptom of small, round patches helps distinguish dollar spot from other lawn diseases, which may have different patterns or symptoms. Understanding this characteristic is crucial for diagnosing and managing lawn health effectively.