4 5 See our website for more information PHASE 1 Cultural: Ensure adequate drainage; reduce surface moisture; control thatch layer (consider timing of aeration and top dressing); encourage morning sunlight penetration; appropriate use of fertiliser and nitrogen source; surface acidification. Biological: Prevent annual meadow-grass ingress into fine turf greens or convert back to finer grasses. Chemical: Effective fungicides are available. Timing of application dictates optimal performance. Preventative use during periods of high disease pressure provides optimal control. Use at the very first signs of disease (before it gets into the grass plant) can control disease but is higher risk and may require recovery period. Microdochium Patch Management Disease Risk Indicators Early symptoms Darkened, water-soaked appearance. White/grey mycelium may be present. Late symptoms Patches enlarge. Salmon-pink to orange-brown colour. White to pink mycelia may be present. Scars dark when wet, pale when dry. May take months to heal. Susceptible grass species All grass species susceptible. Annual meadow-grass most severely affected. Time of year Most common is Spring and Autumn. Most severe in Autumn. Climatic conditions Mild and wet. Shaded areas with poor air circulation particularly susceptible. Turf conditions Sward with high annual meadow-grass content, wet turf surfaces, over-fertilised, excessive thatch layer, alkaline conditions, aeration and topdressing activities at the end of the season (in high disease risk periods). WINTER JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC SPRING SUMMER AUTUMN WINTER In this case 4C13C OPTIMUM TEMP In this case 4C13C OPTIMUM TEMP TURF STRESS LEAF WETNESS LEAF WETNESS PHASE 2 PHASE 3
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