Dollar Spot is a common disease deriving its name from the size and shape the infection that centers on short-cut bent grass. On longer-cut turf grass, infected centers of completely killed turf grass may be several inches in diameter.
Viewed from a distance, Dollar Spot resembles various other turf problems, especially on higher-cut grass species. Closer inspection, however, reveals the characteristic hourglass symptoms on the individual blades of grass. Regardless of grass variety or species, the disease is first evident as yellow or yellow-green blotches. These will soon appear water-soaked, and within 24 hours the blotches will bleach to a light-tan or straw color. In the early morning, a white cobwebby growth of fungal thread is often visible in the infected center. Overall, the most reliable symptom for diagnosis includes the presence of constricted straw-colored areas with reddish-brown margins on the leaf blade.
Avoid mowing wet turfgrass, which only spreads the fungus pathogen, creating extensive damage by smearing spores throughout your lawn and opening its vascular system to further disease that can damage the health of your lawn.
Avoid watering in the evening or at night.