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Wild Oat (Avena fatua) Control in Spring Wheat (Triticum aestivum) and Barley (Hordeum vulgare) with Reduced Rates of Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

Eric Spandl ,
Beverly R. Durgan  and
Douglas W. Miller
Eric Spandl
Affiliation:
Department of Agronomy and Plant Genetics, University of Minnesota, St, Paul, MN 55108
Beverly R. Durgan
Affiliation:
Department of Agronomy and Plant Genetics, University of Minnesota, St, Paul, MN 55108
Douglas W. Miller
Affiliation:
Department of Agronomy and Plant Genetics, University of Minnesota, St, Paul, MN 55108
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Abstract

Rates and application timings of postemergence herbicides for wild oat control in spring wheat and barley were evaluated at Crookston, MN, from 1994 to 1996. Diclofop, imazamethabenz, and fenoxaprop plus MCPA plus thifensulfuron plus tribenuron were applied to one- to three-leaf wild oat; and difenzoquat, imazamethabenz, fenoxaprop plus MCPA plus thifensulfuron plus tribenuron, and fenoxaprop plus 2,4-D plus MCPA were applied to four- to five-leaf wild oat at 1/2 ×, 3/4 ×, and 1 × rates. Wild oat response to herbicide rate and timing was similar in wheat and barley. Wild oat control with 1/2 × rates generally was less than that with 3/4 × rates, which was lower than or similar to that with 1 × rates. Wild oat biomass was often reduced less with 1/2 × rates than 1 × rates. However, reducing herbicide rates generally did not influence grain yields or net economic return. Grain yields and net economic return were generally greater in herbicide-treated plots than in the nontreated control.

Keywords

Diclofop, (±)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic aciddifenzoquat, 1,2-dimethyl-3,5-diphenyl-1H-pyrazoliumfenoxaprop, (±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acidMCPA, (4-chloro-2-methylphenoxy)acetic acid2,4-D, (2,4-dichlorophenoxy)acetic acidwild oat, Avena fatua L. # AVEFAbarley, Hordeum vulgare L.wheat, Triticum aestivum L.Herbicide application rateherbicide application timingdiclofopdifenzoquatfenoxapropimazamethabenzMCPAthifensulfurontribenuron2,4-DAVEFACOC, crop oil concentrateFDM, fenoxaprop plus 2,4-D plus MCPA (trade name—TILLER)FMTT, fenoxaprop plus MCPA plus thifensulfuron plus tribenuron (trade name—CHEYENNE)NET, net economic returnSD, standard deviation.
Type
Research
Information
Weed Technology , Volume 11 , Issue 3 , September 1997 , pp. 591 - 597
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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