E EvapIQ
← Disease Library

Yellow Patch

Also known as: Cool-temperature brown patch

Pathogen: Rhizoctonia cerealis

Identification

Symptoms

  • Yellow rings or patches in cool wet conditions
  • Often on annual bluegrass or bentgrass greens
  • Usually cosmetic but slow to recover
Season
Jan, Feb, Mar, Apr, Oct, Nov, Dec
Regions
Pacific Northwest, Northeast, Midwest
Turf Hosts
Annual Bluegrass, Bentgrass

Go deeper on Yellow Patch

Create a free EvapIQ account to see full scouting notes, management notes for Yellow Patch - and every other disease in this library.

Create Free Account Already have an account? Log in

Sources

This is identification help, not a diagnosis. Symptoms described here can overlap between diseases and other causes (drought, wear, nutrient deficiency). When you're not sure, or before applying any treatment, contact your state's Cooperative Extension office - most offer free or low-cost diagnosis and know your local conditions best.