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Weed Control With Reduced Rates of Four Soil Applied Soybean Herbicides

Published online by Cambridge University Press:  12 June 2017

Kilwake C. Muyonga ,
Michael S. Defelice  and
Barry D. Sims
Michael S. Defelice
Affiliation:
Dep. Agron., Univ. of Missouri, Columbia, MO 65211
Barry D. Sims
Affiliation:
Dep. Agron., Univ. of Missouri, Delta Center, Portageville, MO 63873
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Abstract

Field studies were conducted at two locations in Missouri in 1990 and 1991 to evaluate control of velvetleaf, ivyleaf morningglory, and cocklebur in soybean with label rates (1×) or reduced rates (0.5×) of four PPI herbicides followed with or without cultivation and POST application of one fourth (0.25×) the label rate of imazethapyr. Weed control and soybean yield with the 0.5× rate of preplant clomazone, imazaquin, metribuzin, and metribuzin + chlorimuron followed by either cultivation or imazethapyr POST was equivalent to a 1× rate of the PPI herbicides followed by either cultivation or imazethapyr. Weed control and soybean yield with the 0.5× rates of the PPI herbicides without cultivation or POST imazethapyr were lower than with 1× rates of PPI herbicides.

Keywords

Chlorimuron, 2-[[[[4-chloro-6-methoxy-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidclomazone, 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinoneimazaquin, 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 acidmetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onecommon cocklebur, Xanthium strumarium L♯ XANSTivyleaf morningglory, Ipomoea hederacea (L.) Jacq. ♯ IPOHEvelvetleaf, Abutilon theophrasti medicus. ♯ABUTHsoybeans, Glycine max (L.) Merr. ‘Williams 82’ and ‘DPL-415.’Clomazonechlorimuronimazaquinimazethapyrmetribuzintrifluralincultivationtillageweed densityABUTHIPOHEXANST
Type
Weed Management
Information
Weed Science , Volume 44 , Issue 1 , March 1996 , pp. 148 - 155
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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