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Red Thread

Red Thread
Laetisaria fuciformis.

Turf Disease

Susceptible turfgrass: All turfgrasses, but particularly severe on fine-leaf fescue, and perennial ryegrass.

South Africa Golf Turf Care Treating Red Thread

Symptoms
Red thread causes patches that are reddish-brown in colour and 2.5 to 10 cm in diameter up to 0.5 m.

Conditions favouring disease
Red thread thrives in temperatures between 4°C to 29°C and in locations that are low in nitrogen. It also occurs in areas that experience more than 10 hours a day of foliar wetness for several consecutive days.

Integrated Turf Management

  • Mow turf frequently and collect clippings to remove diseased portions of the leaves.

  • Maintain adequate nitrogen and a balanced fertility.

  • Apply moderate to high amounts of phosphorous and potash.

  • Maintain the soil pH between 6.5 to 7.0.

  • Reduce shade.

  • Increase air circulation to reduce turf moisture retention. 

  • Irrigate turf deeply and as infrequently as possible.

  • Use fungicides to control disease when it is a chronic problem.

Fungicidal Control
Heritage has label recommendation for red thread in South Africa.