Turfgrass - Red Thread Disease

The following is information on Red Thread disease in turf from Rutgers University.

Red Thread disease, caused by the fungus Laetisaria fuciformis, will be showing up in the near future on susceptible turf. Infections are characterized by the appearance of short red threads (1/16-1/4”) long emerging from tan-colored leaf blades. Affected patches are typically pink in color and range from 1 to 6 inches in diameter. Although perennial ryegrass and fine fescue are most susceptible, Kentucky bluegrass and tall fescue may also be affected. Red thread is typically found on “hungry” (low fertility) turf during cool, wet weather. Well-fertilized turf, however, may also be attacked. To obtain optimum disease control, maintain adequate fertility levels, avoid drought stress and excessive thatch, and apply Banner, Bayleton, Chipco 26GT*, Compass, Curalan*, Eagle, Headway, Heritage, Insignia, ProStar, Rubigan, Tartan or Touche per manufacturer’s recommendations (*not for use on residential properties).

Photo from the University of Wisconsin, Madison plant pathology.

Reprinted from the May 3, 2007 edition of the Plant and Pest Advisory; Landscape, Turf, and Nursery edition, Rutgers Cooperative Extension and New Jersey Agricultural Experiment Station.