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Application Timing for Weed Control in Corn (Zea mays) with Dicamba Tank Mixtures

Published online by Cambridge University Press:  12 June 2017

Eric Spandl ,
Thomas L. Rabaey ,
James J. Kells  and
R. Gordon Harvey
Eric Spandl
Affiliation:
Michigan State University
Thomas L. Rabaey
Affiliation:
University of Wisconsin
James J. Kells
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824
R. Gordon Harvey
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
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Abstract

Optimal application timing for dicamba–acetamide tank mixes was examined in field studies conducted in Michigan and Wisconsin from 1993 to 1995. Dicamba was tank mixed with alachlor, metolachlor, or SAN 582H and applied at planting, 7 d after planting, and 14 d after planting. Additional dicamba plus alachlor tank mixes applied at all three timings were followed by nicosulfuron postemergence to determine the effects of noncontrolled grass weeds on corn yield. Delaying application of dicamba–acetamide tank mixes until 14 d after planting often resulted in lower and less consistent giant foxtail control compared with applications at planting or 7 d after planting. Corn grain yield was reduced at one site where giant foxtail control was lower when application was delayed until 14 d after planting. Common lambsquarters control was excellent with 7 or 14 d after planting applications. At one site, common lambsquarters control and corn yield was reduced by application at planting. Dicamba–alachlor tank mixes applied 7 d after planting provided similar weed control or corn yield, while at planting and 14 d after planting applications provided less consistent weed control or corn yield than a sequential alachlor plus dicamba treatment or an atrazine-based program.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamideatrazine, 6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diaminedicamba, 3,6-dichloro-2-methoxybenzoic acidSAN 582H, 2-chloro-N[(1-methyl-2-methoxy)ethyl]-N-(2,4-dimethyl-thien-3-yl)acetamidemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamidecommon lambsquarters, Chenopodium album L. # CHEALgiant foxtail, Setaria faberi Herrm. # SETFAcorn, Zea mays L.Atrazine alternativesalachloratrazinemetolachlornicosulfuronSAN 582HChenopodium albumSetaria faberiCHEALSETFAAP, at plantingCOC, crop oil concentrateDAP, days after plantingPOST, postemergencePRE, preemergence
Type
Research
Information
Weed Technology , Volume 11 , Issue 3 , September 1997 , pp. 602 - 607
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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