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Response to Ethofumesate of Annual Bluegrass (Poa annua) and Overseeded Bermudagrass (Cynodon dactylon)

Published online by Cambridge University Press:  12 June 2017

B. J. Johnson
B. J. Johnson*
Affiliation:
Univ. of Georgia, Georgia Stn., Experiment, GA 30212
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Abstract

Annual bluegrass (Poa annua L.) was controlled in bermudagrass [Cynodon dactylon (L.) Pers.] turf when ethofumesate [(±)-2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate] was applied at 1.1 kg/ha in October and again in November, but not when applied in February and March. A single, October ethofumesate treatment, did not affect spring growth of nonoverseeded bermudagrass, but the growth of selected cultivars was delayed slightly from October + November treatment. Turf growth was severely delayed for all bermudagrass cultivars when ethofumesate treatments were delayed until February and March. The October and November ethofumesate treatments reduced the quality of overseeded perennial ryegrass [Lolium perenne (L.) ‘Medalist VI’] slightly, but did not injure it permanently and the turf recovered fully. The transition from ryegrass back to bermudagrass turf was good in the spring regardless of ethofumesate treatment. Even though turf cover was excellent throughout the transition period, bermudagrass cover during June and July was less when ethofumesate was applied in October than when application was delayed until after bermudagrass became dormant.

Keywords

Turfweed controloverseededtransitionputting green
Type
Research Article
Information
Weed Science , Volume 31 , Issue 3 , May 1983 , pp. 385 - 390
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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