14 15 See our website for more information See our website for more information Yellow Tuft Symptoms Small spots (1-3 cm in diameter) of yellowed, densely tillered plants with shortened roots that are easily pulled from the turf. Susceptible grass species All grass species susceptible. Bentgrass most common in UK. Time of year Any time of year when conditions are conducive. Climatic conditions Cool, wet and humid. Turf conditions Saturated rootzones due to flooding or poor drainage. Low lying areas. Cultural: Improve soil drainage, pump water off immediately after flooding, promote strong grass growth, verticut to remove infected plants. Chemical: None currently with label recommendation. Management Cultural: Reduce thatch layers by physical removal and prevent build up by regular aeration and top dressing. Iron sulphate may mask discolouration. If hydrophobic conditions have formed, wetting agents will help improve water penetration. Chemical: Some fungicides may offer incidental control. Addition of wetting agent or applying wetting agent first will help the fungicide penetrate the rootzone. Management Symptoms Circular patches, arcs or ribbons of stimulated grass growth or discoloured grass growth (yellow or bleached) with or without visible mycelia at the base of the sward. Patches may be sunken due to degradation of the thatch. Musty smell. Susceptible grass species All grass species susceptible. Time of year Autumn and Winter. Climatic conditions Continual wet/dry cycles. Warm soil temperatures. Turf conditions Excessive thatch layers, rootzone with low microbial populations. Superficial Fairy Rings
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