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Hemp Dogbane (Apocynum cannabinum) Control in Corn (Zea mays) with Selective Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

Corey V. Ransom  and
James J. Kells
Corey V. Ransom
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
James J. Kells*
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
*
Corresponding author's E-mail address: kells@pilot.msu.edu.
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Abstract

Field studies were conducted from 1994 to 1996 in Michigan to evaluate postemergence (POST) herbicides for hemp dogbane control in corn. Studies were initiated at no-tillage and chisel-plowed sites each of the three years. Nicosulfuron and primisulfuron were evaluated alone and in combination with 2,4-D amine or dicamba. In 1995 and 1996, CGA-152005 plus primisulfuron was also applied alone and in combination with 2,4-D or dicamba. Control varied among years and sites. Nicosulfuron, primisulfuron, and CGA-152005 plus primisulfuron applied alone controlled 30% of the hemp dogbane, and dicamba or 2,4-D alone controlled 42 and 66%, respectively. Tank mixtures of nicosulfuron, primisulfuron, or CGA-152005 plus primisulfuron with dicamba were more effective and more consistent than dicamba alone. Combinations of nicosulfuron, primisulfuron, or CGA-152005 plus primisulfuron with 2,4-D gave the most effective and consistent control across sites, with an average of 93% control. In general, treatments controlled only shoots that had emerged at the time of application. New shoots emerged following herbicide application at the chisel-tillage sites in 1994 and 1995 but not at the no-tillage sites. However, in 1996, shoot emergence following treatment occurred in both no-tillage and chisel-tillage sites.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidnicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamideprimisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidCGA-152005 (proposed common name, prosulfuron), 1-(4-methoxy-6-methyl-triazin-2-yl)-3-[2-(3,3,3-trifluoropropyl)-phenylsulfonyl]-urea2,4-D, (2,4-dichlorophenoxy)acetic acidhemp dogbane, Apocynum cannabinum L. # APPCAcorn, Zea mays L., # ZEAMXPerennial weedtillageAPPCAZEAMXGDD, growing degree daysNIS, nonionic surfactantPOST, postemergencePRE, preemergenceWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 12 , Issue 4 , December 1998 , pp. 631 - 637
Copyright
Copyright © 1998 by the Weed Science Society of America 

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Footnotes

Current address of senior author: Malheur Experiment Station. Oregon State University, 595 Onion Avenue, Ontario, OR 97914

References

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