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Glyphosate Tank Mixtures with SAN 582 for Burndown or Postemergence Applications in Glyphosate-Tolerant Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Robert Scott ,
David R. Shaw  and
William L. Barrentine
Robert Scott
Affiliation:
Department of Plant and Soil Sciences, Mississippi State, MS 39762
David R. Shaw
Affiliation:
Department of Plant and Soil Sciences, Mississippi State, MS 39762
William L. Barrentine
Affiliation:
Kumiai Chemical Industry Co. Ltd., Leland, MS 38756
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Abstract

Field experiments were conducted to evaluate postemergence (POST)-applied tank mixtures of 560, 1,120, and 1,680 g ai/ha glyphosate with or without 1,120 g ai/ha SAN 582 (proposed name, dimethenamid) as burndown treatments or POST in glyphosate-tolerant soybean. SAN 582 was not antagonistic with glyphosate at the glyphosate rates evaluated. In the burndown study, glyphosate controlled horseweed 98% or more and curly dock 82% or more with or without SAN 582. However, broadleaf signalgrass emerged after the burndown treatments were applied. All tank mixtures that included SAN 582 controlled broadleaf signalgrass 84 to 96%, 6 wk after treatment. In the glyphosate-tolerant soybean study, glyphosate controlled barnyardgrass and johnsongrass present at the time of application 89% or more, regardless of rate. Tank mixtures of SAN 582 with glyphosate controlled late-season flushes of barnyardgrass through residual activity of the SAN 582. Applying SAN 582 with glyphosate improved soybean yield 500 kg/ha over glyphosate applied alone.

Keywords

SAN 582, 2-chloro-N-(2,4-dimethyl-3-thienyl)-N-(2-methoxy-1-methylethyl)acetamideglyphosate, N-(phosphonomethyl)glycinebarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGbroadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash # BRAPPcurly dock, Rumex crispus L. # RUMCRhorseweed, Conyza canadensis (L.) Cronq. # ERICAjohnsongrass, Sorghum halepense (L.) Pers. # SORHAsoybean, Glycine max (L.) Merr. ‘Hartz 5566RR.’AntagonismsynergismEchinochloa crus-galliBrachiaria platyphyllaRumex crispusConyza canadensisSorghum halepenseECHCGBRAPPRUMCRERICASORHAPOST, postemergence
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 23 - 26
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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