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| Symptoms: prevalent in the Spring and
Fall when temperatures range between 73-90 F and night
temperatures drop below 68 F. Fungus generally stops at
90F.Circular pattern of yellow grass with grayish colored
smoke ring at the perimeter of thedisease halo. Leaves
pull loose very easily since the pathogen destroys the
tissue of at the base of the leaf sheath. Starts as small
circular patches of water-soaked shoots that wilt and
turn light brown. Stolons remain green. New green leaves
may emerge in the center of the diseased area. Cultural control: avoid high nitrogen levels with high moisture conditions irrigate early in the morning to remove dew and allow rapid drying of the grass remove grass clippings during periods of disease activity |
Fungicides: azoxystrobin (Heritage) trifloxystrobin (Compass) cyproconazole (Sentinel) flutolanyl (ProStar) thiram (Tersan) iprodione (Chipco 26GT) polyoxin D zinc salt (Endorse) pyraclostrobin (Insignia) fludioxonil (Medallion) |
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