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Comparison of Fall Versus Spring Applications of Sulfometuron for Common Bermudagrass (Cynodon dactylon) Release

James M. Taylor and G. Euel Coats
Weed Technology
Vol. 10, No. 4 (Oct. - Dec., 1996), pp. 947-950
Stable URL: http://www.jstor.org/stable/3987939
Page Count: 4
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Comparison of Fall Versus Spring Applications of Sulfometuron for Common Bermudagrass (Cynodon dactylon) Release
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Abstract

A study was conducted to evaluate effects of application timing and sulfometuron rate on weed control and bermudagrass tolerance. Sulfometuron was applied at rates from 13 to 105 g ai/ha and compared to 1120 g ae/ha 2,4-D amine. Control of Italian ryegrass and common vetch was not affected by October, November, December, or March application dates and 39 to 105 g/ha sulfometuron provided equivalent control of both species 6 mo after the initial treatment. Percent green cover of bermudagrass at 6 mo after the initial treatment was 22% or less following March applications compared to 36% or greater when applied in October, November, or December. More bermudagrass injury occurred following March treatments of 52 g/ha or greater sulfometuron where green cover was 14% and less compared to 22 and 30% green cover following 13 g/ha sulfometuron or 1120 g/ha 2,4-D amine, respectively.

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