Large Patch

Grass Affected

Zoysiagrass, Bermudagrass, St. Augustinegrass, Centipedegrass, Seashore Paspalum


Diagnostic Description

  • Initial infections are in fall, but symptoms are usually most apparent in spring as grasses emerge from winter dormancy. Appears as rings or patches of blighted turf 5-in. to 10-feet in diameter. Patches are brown or yellowish in appearance with reddish colored leaf spots on the leaf sheaths, stems, and even stolons.
  • Favored by high humidity, excessive soil moisture in fall from rain or irrigation, nighttime temperatures 50 t0 60 F, excessive shade and cloud cover, and extremely close mowing height. With Large Patch disease of warm season grasses, leaf fascicles pull easily from plant due to rot at leaf base.


Conditions Favoring Infestation and Typically Yearly Occurrence

Mostly early Spring, sometimes in fall