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Control of Triazine-Resistant Common Lambsquarters (Chenopodium album) and Two Pigweed Species (Amaranthus spp.) in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

E. Patrick Fuerst ,
Michael Barrett  and
Donald Penner
E. Patrick Fuerst
Affiliation:
Dep. Crop and Soil Sci., Pestic. Res. Ctr., Michigan State Univ., E. Lansing, MI 48824
Michael Barrett
Affiliation:
Dep. Crop and Soil Sci., Pestic. Res. Ctr., Michigan State Univ., E. Lansing, MI 48824
Donald Penner
Affiliation:
Dep. Crop and Soil Sci., Pestic. Res. Ctr., Michigan State Univ., E. Lansing, MI 48824
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Abstract

Various chemical treatments were evaluated over two growing seasons for control of triazine-resistant common lambsquarters (Chenopodium album L. # CHEAL) and for control of a triazine-resistant infestation containing both redroot pigweed (Amaranthus retroflexus L. # AMARE) and Powell amaranth (A. powellii S. Wats. # AMAPO). Atrazine [6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine], cyanazine {2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl] amino]-2-methylpropanenitrile}, and metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] provided unsatisfactory control of these biotypes. Satisfactory control of common lambsquarters was obtained with preemergence applications of pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] or dicamba (3,6-dichloro-2-methoxybenzoic acid), or postemergence applications of dicamba, bromoxynil (3,5-dibromo-4-hydroxybenzonitrile), or bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide]. Satisfactory control of pigweed was obtained with preemergence applications of alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide] or postemergence treatments of dicamba, bromoxynil, or 2,4-D [(2,4-dichlorophenoxy) acetic acid].

Keywords

Herbicide resistanceCHEALAMAREAMAPO
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 3 , May 1986 , pp. 440 - 443
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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