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Influence of Application Variables on Efficacy of Postemergence Applications of DPX-PE350

Published online by Cambridge University Press:  12 June 2017

David L. Jordan ,
Robert E. Frans  and
Marilyn R. McClelland
David L. Jordan
Affiliation:
Dep. Agron., Univ. Ark., Fayetteville, AR 72703
Robert E. Frans
Affiliation:
Dep. Agron., Univ. Ark., Fayetteville, AR 72703
Marilyn R. McClelland
Affiliation:
Dep. Agron., Univ. Ark., Fayetteville, AR 72703
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Abstract

Experiments were conducted to compare control of entireleaf morningglory with POST applications of DPX-PE350 applied with no adjuvant, a nonionic surfactant, or crop oil concentrate in spray volumes of 94, 235, and 375 L ha−1. Control was greater with a nonionic surfactant or crop oil concentrate than with no adjuvant and control with crop oil concentrate exceeded control with the nonionic surfactant. Spray volume had no effect on efficacy. DPX-PE350 was more effective when applied to foliage only or to soil plus foliage than when applied to soil only after emergence of entireleaf morningglory. Control from soil-only applications was lower on a silty clay soil than on a silt loam soil. Except for sicklepod, mixing DPX-PE350 with fluometuron or MSMA had little effect on weed control.

Keywords

DPX-PE350, sodium 2-chloro-(4,5-dimethoxypyrimidin-2-ylthio)benzoatefluometuron, N,N-dimethyl-N′-[3-(trifluoromethyl)phenyl]ureaMSMA, monosodium salt of methylarsonic acidentireleaf morningglory, Ipomoea hederacea var. integriuscula Gray # IPOHGsicklepod, Cassia obtusifolia L. # CASOBAdjuvantsherbicide interactionssite of absorptionspray volumefluometuronMSMACassia obtusifoliaIpomoea hederacea var. integriusculaCASOBIPOHG
Type
Research
Information
Weed Technology , Volume 7 , Issue 3 , September 1993 , pp. 619 - 624
Copyright
Copyright © 1993 by the Weed Science Society of America 

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