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Effect of Tillage Systems on the Efficacy and Phytotoxicity of Imazaquin and Imazethapyr in Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

J. Anthony Mills  and
William W. Witt
J. Anthony Mills
Affiliation:
Dep. Agron., Univ. Kentucky, Lexington, KY 40546
William W. Witt
Affiliation:
Dep. Agron., Univ. Kentucky, Lexington, KY 40546
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Abstract

Field experiments were conducted to evaluate the interactions of tillage systems with imazaquin and imazethapyr on weed control and soybean injury and yield. Control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail from imazaquin and imazethapyr in conventional tillage was generally equal to or greater than control in no-tillage. However, under limited rainfall, weed control in no-tillage was generally equal to or greater than control in conventional tillage. Reductions in soybean heights due to herbicide treatment were evident in both tillage systems in 1985 and 1986 but not in. Soybean yields were reduced in 1985 from imazaquin at 140, 210, and 250 g/ha and imazethapyr at 105 and 140 g/ha. Yields were not reduced in 1986 and. Imazaquin and imazethapyr appear to provide adequate control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail in conventional and no-till systems.

Keywords

Imazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidparaquat, 1,1′-dimethyl-4,4′-bipyridinium ionsoybean, Glycine max ‘Williams 82′jimsonweed, Datura stramonium L. ♯3 DATSTcommon cocklebur, Xanthium strumarium L. ♯ XANSTivyleaf morningglory, Ipomoea hederaceae (L.) Jacq. ♯ IPOHEvelvetleaf, Abutilon theophrasti Medik. ♯ ABUTHgiant foxtail, Setaria faberi Herrm. ♯ SETFANo-tillcropping systemssoybean injuryweed controlAC-252,214AC-263,499ABUTHDATSTIPOHESETFAXANST
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 37 , Issue 2 , March 1989 , pp. 233 - 238
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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