|
|
|
|
Brown Patch Management (Rhizoctonia solani) |
|
| 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) |