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Influence of Herbicides and Tillage on the Control of Triazine-Resistant Smooth Pigweed (Amaranthus hybridus) in Corn (Zea mays) and Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Ronald L. Ritter ,
Thomas C. Harris  and
William J. Varano
Ronald L. Ritter
Affiliation:
Agron. Dep., Univ. of Maryland, College Park, MD 20742
Thomas C. Harris
Affiliation:
Agron. Dep., Univ. of Maryland, College Park, MD 20742
William J. Varano
Affiliation:
Agron. Dep., Univ. of Maryland, College Park, MD 20742
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Abstract

In field studies, a preemergence application of metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] followed by an early postemergence application of dicamba (3,6-dichloro-o-anisic acid) gave good season-long control of smooth pigweed (Amaranthus hybridus L. ♯ AMACH) in conventional and no-till corn (Zea mays L. ‘Pioneer 3184’ and ‘Pioneer 3382’). In soybeans [Glycine max (L.) Merr. ‘Williams' and ‘Essex’], best control of smooth pigweed was achieved with an early postemergence application of sethoxydim {2-[1-(ethyoxy-imino)butyl]-5-[2-(ethylthio) propyl]-3-hydroxy-2-cyclohexen-1-one} plus acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid}. Tillage played a role in the degree of smooth pigweed control. Best control of smooth pigweed in corn was obtained when the ground was moldboard plowed and disced, and least control was obtained when corn was no-till planted in the previous year's corn stalks or in a rye (Secale cereale L.) cover crop.

Keywords

Reduced tillageno-tilltriazinesAMACH
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 3 , May 1985 , pp. 400 - 404
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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