CONTROL OF ANNUAL BLUEGRASS (POA-ANNUA) IN OVERSEEDED BERMUDAGRASS (CYNODON SPP) GOLF GREENS

Ethofumesate, [(+)-2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate] applied preemergence provided selective control of annual bluegrass of (P. annua L.) in perennial ryegrass (Lolium perenne L.) overseeded on dormant bermuda grass [C. dactylon (L.) Pers. .times. C. transvaalensis Burtt Davy ''Tifdwarf''] golf greens. Control in excess of 95% was obtained with single applications at the 2.2 kg/ha rate in 2 of 3 yr, but multiple applications were required when ethofumesate was applied at 1.1 kg/ha or less. Ethofumesate caused temporary cessation of bermuda grass growth when applied in the fall. Feb. applications slowed the spring transition to bermuda grass.