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Annual Grass Control by Glyphosate plus Bentazon, Chlorimuron, Fomesafen, or Imazethapyr Mixtures

Published online by Cambridge University Press:  12 June 2017

Agustin E. Gimenez ,
Alan C. York ,
John W. Wilcut  and
Roger B. Batts
Agustin E. Gimenez
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
Alan C. York
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
John W. Wilcut
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
Roger B. Batts
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
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Abstract

The isopropylamine salt of glyphosate at 420, 560, and 840 g ae/ha applied alone or mixed with the sodium salt of bentazon at 840 g ai/ha, chlorimuron at 9 g ai/ha, the sodium salt of fomesafen at 350 g ai/ha, or the ammonium salt of imazethapyr at 70 g ae/ha was evaluated for control of large crabgrass and broadleaf signalgrass. Neither grass was controlled by bentazon, fomesafen, or chlorimuron. Imazethapyr controlled large crabgrass and broadleaf signalgrass 30 and 72%, respectively, 3 weeks after treatment (WAT). Glyphosate at all rates controlled both grasses 100%. Control 3 WAT was unaffected by mixing bentazon, chlorimuron, fomesafen, or imazethapyr with glyphosate. Broadleaf signalgrass control 1 WAT was reduced 4 to 15% by mixing bentazon with glyphosate.

Keywords

Bentazon, 3-(1-methylethyl)-(lH)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidechlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidfomesafen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-N-(methylsulfonyl)-2-nitrobenzamideglyphosate, N-(phosphonomethyl)glycineimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidbroadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash # BRAPPlarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAHerbicide mixturespostemergence weed controlBrachiaria platyphyllaDigitaria sanguinalisBRAPPDIGSAPOST, postemergenceWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 134 - 136
Copyright
Copyright © 1997 by the Weed Science Society of America 

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