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Herbicide Systems in Stale Seedbed Soybean (Glycine max) Production

Published online by Cambridge University Press:  12 June 2017

Lawrence R. Oliver ,
Tracy E. Klingaman ,
Marilyn McClelland  and
Robert C. Bozsa
Lawrence R. Oliver
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
Tracy E. Klingaman
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
Marilyn McClelland
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
Robert C. Bozsa
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
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Abstract

Field experiments were conducted using a stale seedbed production system to determine the effect of herbicide application time on preplant, preplant incorporated (PPI), and at-planting treatments on weed control and soybean yield. Herbicides were applied on the surface preplant (PPL) or PPI at 6 to 7, 4 to 5, and 2 to 3 wk before planting and just prior to planting. The differences in weed control and soybean yield among years were due to rainfall patterns 2 wk after herbicide application and during the growing season. Preplant treatments applied 2 to 5 wk before planting generally controlled common cocklebur and pitted morningglory better than preplant treatments applied 6 to 7 wk before planting due to persistence of herbicide activity or treatments at planting due to a greater chance of obtaining adequate rainfall for herbicide activation, more uniform seedbed at planting, and larger weeds at application. Metribuzin plus chlorimuron was less suited than imazaquin as a preplant treatment when applied more than 2 weeks before planting.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]-amino]sulfonyl]benzoic acidimazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethy)-5-oxo-1H-imidazol-2-yl]-3-quinolincarboxylic acidmetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onesoybean, [Glycine max. (L.) Merr.], common cocklebur, Xanthium strumarium L. # XANST3 pitted morningglory, Ipomoea lacunosa L. # IPOLANarrow-row soybeanchlorimuronimazaquinmetribuzinIpomoea lacunosaXanthium strumariumIPOLAXANST
Type
Research
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 816 - 823
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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