Tank Mixing Pendimethalin with Pyroxasulfone and Chloroacetamide Herbicides Enhances In-Season Residual Weed Control in Corn

dc.contributor.authorJha, Prashant
dc.contributor.authorKumar, Vipan
dc.contributor.authorGarcia, Josefina
dc.contributor.authorReichard, Nicholas
dc.date.accessioned2015-12-28T21:33:00Z
dc.date.available2015-12-28T21:33:00Z
dc.date.issued2015-05
dc.description.abstractKochia, common lambsquarters, and wild buckwheat are major problem weeds in glyphosate-resistant corn production in the northern Great Plains of the United States. Field research was conducted in 2011 and 2012 near Huntley, MT to investigate effective PRE herbicides applied alone or in premixes with or without tank-mixed pendimethalin for extended in-season residual control of the selected broadleaf weeds in glyphosate-resistant corn. Control of kochia, common lambsquarters, and wild buckwheat with recently registered herbicide premixes, including saflufenacil + dimethenamid-P and S-metolachlor + mesotrione, was as high as 95 and 90% at 21 and 63 d after treatment (DAT), and mostly similar to the standard atrazine treatment. Residual control of common lambsquarters and wild buckwheat from pyroxasulfone was higher at 298 compared with 149 g ai ha−1 rate. Pyroxasulfone and other chloroacetamide herbicides (acetochlor or dimethenamid-P) applied alone failed to provide greater than 79, 70, and 54% residual control at 21, 35, and 63 DAT, respectively, of the weed species investigated. Residual weed control throughout the growing season was significantly improved with the addition of pendimethalin to pyroxasulfone (149 g ha−1), acetochlor, or dimethenamid-P when compared with any of the three herbicides applied alone. Kochia control by pyroxasulfone, acetochlor, or dimethenamid-P tank mixed with pendimethalin was as high as 94, 92, and 81% at 21, 35, and 63 DAT, respectively. Control of common lambsquarters with the addition of pendimethalin to pyroxasulfone or acetochlor was improved to 94, 89, and 81% at 21, 35, and 63 DAT, respectively. Similarly, wild buckwheat control with acetochlor plus pendimethalin was improved to 87, 85, and 82% at 21, 35, and 63 DAT, respectively. Consistent with the extended in-season (up to 9 wk) residual weed control, pyroxasulfone, acetochlor, or dimethenamid-P treatments when tank mixed with pendimethalin had higher corn yields compared with the herbicides applied alone. The investigation on residual herbicides that provide extended in-season weed control should be continued as an important aspect of glyphosate stewardship and to mitigate the occurrence of glyphosate-resistant weed populations in grower fields.en_US
dc.identifier.citationJha, Prashant, Vipan Kumar, Josefina Garcia, and Nicholas Reichard. "Tank Mixing Pendimethalin with Pyroxasulfone and Chloroacetamide Herbicides Enhances In-Season Residual Weed Control in Corn." Weed Technology 29, no. 2 (May 2015): 198-206. DOI:https://dx.doi.org/10.1614/WT-D-14-00095.1.en_US
dc.identifier.issn0890-037X
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/9467
dc.titleTank Mixing Pendimethalin with Pyroxasulfone and Chloroacetamide Herbicides Enhances In-Season Residual Weed Control in Cornen_US
dc.typeArticleen_US
mus.citation.extentfirstpage198en_US
mus.citation.extentlastpage206en_US
mus.citation.issue2en_US
mus.citation.journaltitleWeed Technologyen_US
mus.citation.volume29en_US
mus.contributor.orcidKumar, Vipan|0000-0002-8301-5878en_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.identifier.doi10.1614/WT-D-14-00095.1en_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentResearch Centers.en_US
mus.relation.researchgroupSouthern Ag Research Center.en_US
mus.relation.universityMontana State University - Bozemanen_US

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