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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
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

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.

Information

Type
Research
Copyright
Copyright © 1994 by the Weed Science Society of America 

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