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Herbicide Systems for Johnsongrass (Sorghum halepense) Control in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Kim Winton-Daniels ,
Robert Frans  and
Marilyn McClelland
Kim Winton-Daniels
Affiliation:
Univ. Arkansas, Fayetteville, AR 72703
Robert Frans
Affiliation:
Univ. Arkansas, Fayetteville, AR 72703
Marilyn McClelland
Affiliation:
Univ. Arkansas, Fayetteville, AR 72703
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Abstract

Fenoxaprop, fluazifop-P, haloxyfop, quizalofop, and sethoxydim applied postemergence reduced johnsongrass populations in soybeans over a 3-yr period. The selective postemergence herbicides were more effective as split applications than as single, high-rate applications for controlling heavy infestations of johnsongrass. Fluchloralin applied preplant incorporated decreased the number of postemergence applications required to maintain johnsongrass control above 80%, although control depended primarily upon the selective, postemergence herbicides. Glyphosate applied by ropewick reduced johnsongrass populations more when used in conjunction with fluchloralin than when used alone.

Keywords

Fenoxaprop, (±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acidfluazifop-P, (R)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidfluchloralin, N-(2-chloroethyl)-2,6-dinitro-N-propyl-4-(trifluoromethyl)benzenamineglyphosate, N-(phosphonomethyl)glycinehaloxyfop, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidquizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoic acidsethoxydim, 2-[l-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onejohnsongrass, Sorghum halepense (L.)Pers. ♯3 SORHAsoybean, Glycine max (L.)Merr. ‘Forrest’Selective postemergence herbicidessequential applicationsfenoxapropfluazifop-PfluchloralinglyphosatehaloxyfopquizalofopsethoxydimSORHA
Type
Research
Information
Weed Technology , Volume 4 , Issue 1 , March 1990 , pp. 115 - 122
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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