Dollar Spot

Symptoms:

  • Sunken, circular patches that measure several inches.
  • Patches turn from brown to straw color and may eventually coalesce, forming irregularly shaped areas.
  • May display small lesions that turn from yellow-green to straw color with a reddish-brown border.
  • Lesions can extend the full width of the leaf.

Conditions Favoring Disease:

  • Continuous high humidity at temperatures between 59F and 86F.
  • Favored by warm days, cool nights, and intense dews.
  • Infects areas with low levels of nitrogen.
  • More severe in dry soils.
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