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Herbicides for Postemergence Control of Annual Grass Weeds in Seedling Forage Grasses

Published online by Cambridge University Press:  12 June 2017

Thomas J. Peters ,
Russell S. Moomaw  and
Alex R. Martin
Thomas J. Peters
Affiliation:
Dep. Agron., Univ. Nebraska, Concord, NE 68728, and Lincoln, NE 68583
Russell S. Moomaw
Affiliation:
Dep. Agron., Univ. Nebraska, Concord, NE 68728, and Lincoln, NE 68583
Alex R. Martin
Affiliation:
Dep. Agron., Univ. Nebraska, Concord, NE 68728, and Lincoln, NE 68583
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Abstract

The control of three summer annual grass weeds with herbicides during establishment of forage grasses was studied near Concord and Mead, NE, in 1984, 1985, and 1986. Three cool-season forage grasses, intermediate wheatgrass, tall fescue, and smooth bromegrass, and two warm-season grasses, big bluestem and switchgrass, were included. The control of three major summer annual grasses, green foxtail, barnyardgrass, and large crabgrass, was excellent with fenoxaprop at 0.22 kg ai/ha. Slight to moderate injury to cool-season forage grasses and severe injury to warm-season grasses were evident. Sethoxydim at 0.22 kg ai/ha and haloxyfop at 0.11 kg ai/ha controlled green foxtail and large crabgrass, but not barnyardgrass. Sulfometuron-treated big bluestem and switchgrass plots had the best forage stand frequencies and yields and, at the rate used, sulfometuron satisfactorily controlled green foxtail but only marginally controlled barnyardgrass and large crabgrass.

Keywords

Intermediate wheatgrass, Elytrigia intermedia (Host) Nevski. ‘Slate’tall fescue, Festuca arundinacea Schreb. ‘Kentucky 31′smooth bromegrass Bromus inermis Leyss. ‘Lincoln’big bluestem, Andropogon gerardii Vitman. ‘Pawnee’switchgrass, Panicum virgatum L. ‘Pathfinder’sethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onefenoxaprop, (±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acidhaloxyfop, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidgreen foxtail, Setaria viridis (L.) Beauv. ♯3 SETVIlarge crabgrass, Digitaria sanguinalis (L.) Scop. ♯ DIGSAbarnyardgrass [Echinochloa crus-galli (L.) Beauv. ♯ ECHCGand sulfometuron, 2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl] benzoic acidSulfonylureasoxy phenoxystriazinesforage grass establishmentwarm-season grass seedingscool-season grass seedings
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 37 , Issue 3 , May 1989 , pp. 375 - 379
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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