Brown Patch


Brown patch commonly starts as a small spot and can quickly spread outwards in a circular or horseshoe pattern up to a couple of feet wide. Often times while expanding outwards the inside of the circle will recover, leaving the brown areas resembling a smoke-ring.


  • Rings or patches of blighted turfgrass that measure 5 inches or more than 10 feet in diameter.
  • Leaf spots and "smoke rings" - thin, brown borders around the diseased patches that appear most frequently in the early morning.

Conditions Favoring Disease:

  • Active at cool temperatures in the spring and fall.
  • Occurs in areas that experience extended periods of wetness.