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Imazethapyr for Weed Control in Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

John R. Cantwell ,
Rex A. Liebl  and
Fred W. Slife
John R. Cantwell
Affiliation:
Dep. Agron., Univ. Ill., 1102 S. Goodwin Ave., Urbana, IL 61801
Rex A. Liebl
Affiliation:
Dep. Agron., Univ. Ill., 1102 S. Goodwin Ave., Urbana, IL 61801
Fred W. Slife
Affiliation:
Dep. Agron., Univ. Ill., 1102 S. Goodwin Ave., Urbana, IL 61801
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Abstract

Imazethapyr at 0.05 to 0.14 kg ai/ha applied preplant incorporated, preemergence, and postemergence was evaluated alone and with complementary herbicides in the field for weed control in soybean. Imazethapyr controlled 90% or more smooth pigweed regardless of application method or herbicide rate. Imazethapyr at 0.05 kg/ha controlled jimsonweed 30% better postemergence compared to soil applications. Imazethapyr at 0.10 kg/ha controlled 90% or more velvetleaf regardless of application method. The addition of alachlor to soil-applied imazethapyr enhanced giant foxtail, jimsonweed, and velvetleaf control. Adding acifluorfen or bentazon to postemergence imazethapyr antagonized weed control. Adding sethoxydim to postemergence imazethapyr was not beneficial.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidalachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamidebentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-pyridinecarboxylic acidsethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onesoybean, Glycine max (L.)Merr. ‘Wells II’smooth pigweed, Amaranthus hybridus L. ♯3 AMACHgiant foxtail, Setaria faberi Herrm. ♯ SETFAjimsonweed, Datura stramonium L. ♯ DATSTvelvetleaf, Abutilon theophrasti Medik. ♯ ABUTHAcifluorfenbentazonalachlorABUTHAMACHDATSTSETFA
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 596 - 601
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

Literature Cited

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