What do the initial symptoms of dollar spot look like?

The initial symptoms of dollar spot disease in turfgrass are characterized by small, circular, straw-colored spots that typically range from 2 to 6 inches in diameter. These spots are often the first visible indicators that dollar spot is present and can quickly develop in favorable conditions, such as warm, humid weather combined with low nitrogen levels. This specific appearance is crucial for early identification and management of the disease, as recognizing these symptoms allows for timely intervention and reduces the spread of the infection.

In contrast, other symptoms mentioned in the options represent more advanced stages or different conditions. Large patches of brown grass suggest more extensive damage, which usually indicates a more severe or prolonged affliction. Long, thin strips of dead grass might be associated with other types of lawn diseases or environmental stress rather than dollar spot specifically. Completely dead patches denote a significant level of turf degradation, often requiring substantial recovery efforts, whereas dollar spot starts as those discrete small spots, which makes early identification essential for effective management.