Fungus, visible from April through the summer. Reduce Thatch and water thoroughly and infrequently. Chlorothalonil or Maneb may be used when spots first appear. Repeat 10 days later. Read and follow label directions.
Lawn looks grey.
Tips of blades are pale yellow to grey with red or yellow margins. Tiny black dots are visible in the diseased areas. Maintain healthy growth with Nitrogen fertilizer and mow regularly. Chlorothalonil or Maneb may be used. Read and follow label directions.