Comparison of 2,4-D, dicamba and halauxifen-methyl alone or in combination with glyphosate for preplant weed control

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dc.contributor.authorAskew, M. Carteren
dc.contributor.authorCahoon, Charles W. Jr.en
dc.contributor.authorYork, Alan C.en
dc.contributor.authorFlessner, Michael L.en
dc.contributor.authorLangston, David B.en
dc.contributor.authorFerebee, J. Harrisonen
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.date.accessioned2021-05-28T14:40:59Zen
dc.date.available2021-05-28T14:40:59Zen
dc.date.issued2021-02en
dc.description.abstractA field study was conducted in 2017 and 2018 to determine foliar efficacy of halauxifen-methyl, 2,4-D, or dicamba applied alone and in combination with glyphosate at preplant burndown timing. Experiments were conducted near Painter, VA; Rocky Mount, NC; Jackson, NC; and Gates, NC. Control of horseweed, henbit, purple deadnettle, cutleaf evening primrose, curly dock, purple cudweed, and common chickweed were evaluated. Halauxifen-methyl applied at 5 g ae ha(-1) controlled small and large horseweed 89% and 79%, respectively, and was similar to control by dicamba applied at 280 g ae ha(-1). Both rates of 2,4-D-533 g ae ha(-1)(low rate [LR]) or 1,066 g ae ha(-1) (high rate [HR])-were less effective than halauxifen-methyl and dicamba for controlling horseweed. Halauxifen-methyl was the only auxin herbicide to control henbit (90%) and purple deadnettle (99%). Cutleaf evening primrose was controlled 74% to 85%, 51%, and 4% by 2,4-D, dicamba, and halauxifen-methyl, respectively. Dicamba and 2,4-D controlled curly dock 59% to 70% and were more effective than halauxifen-methyl (5%). Auxin herbicides applied alone controlled purple cudweed and common chickweed 21% or less. With the exception of cutleaf evening primrose (35%) and curly dock (37%), glyphosate alone provided 95% or greater control of all weeds evaluated. These experiments demonstrate halauxifen-methyl effectively (>= 79%) controls horseweed, henbit, and purple deadnettle, whereas common chickweed, curly dock, cutleaf evening primrose, and purple cudweed control by the herbicide is inadequate (<= 7%).en
dc.description.notesPartial funding for this research was provided by the cotton producers of North Carolina and Virginia through the Cotton Incorporated State Support Program and by the Virginia Cotton Board. The authors also acknowledge support from the Hatch Program of the National Institute of Food and Agriculture, U.S. Department of Agriculture. No conflicts of interest have been declared.en
dc.description.sponsorshipCotton Incorporated State Support Program; Virginia Cotton Board; Hatch Program of the National Institute of Food and Agriculture, U.S. Department of Agricultureen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1017/wet.2020.83en
dc.identifier.eissn1550-2740en
dc.identifier.issn0890-037Xen
dc.identifier.issue1en
dc.identifier.otherPII S0890037X20000834en
dc.identifier.urihttp://hdl.handle.net/10919/103543en
dc.identifier.volume35en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectBurndownen
dc.subjectglyphosate-resistant weedsen
dc.subjectpreplanten
dc.titleComparison of 2,4-D, dicamba and halauxifen-methyl alone or in combination with glyphosate for preplant weed controlen
dc.title.serialWeed Technologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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