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Synergism with Imazamox Co-applications for Red Rice Control

Published online by Cambridge University Press:  27 June 2017

Eric P. Webster ,
Gustavo M. Teló ,
David C. Blouin ,
Benjamin M. McKnight  and
Eric A. Bergeron
Eric P. Webster*
Affiliation:
Professor, Postdoctoral Researcher, Research Associate, and Research Associate, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
Gustavo M. Teló
Affiliation:
Professor, Postdoctoral Researcher, Research Associate, and Research Associate, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
David C. Blouin
Affiliation:
Professor, Department of Experimental Statistics, Louisiana State University Agricultural Center, 45 Agricultural Administration Building, Baton Rouge, LA 70803
Benjamin M. McKnight
Affiliation:
Professor, Postdoctoral Researcher, Research Associate, and Research Associate, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
Eric A. Bergeron
Affiliation:
Professor, Postdoctoral Researcher, Research Associate, and Research Associate, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
*
*Corresponding author’s E-mail: ewebster@agcenter.lsu.edu
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Abstract

A study was conducted at three locations in Louisiana to evaluate the interactions of imazamox at 44 g ai ha−1 mixed with propanil, thiobencarb, or with a prepackaged mixture of propanil plus thiobencarb. A synergistic response was observed for red rice control for all treatments at 14 days after treatments (DAT); however, at 21 DAT a neutral response was observed for imazamox mixed with propanil or thiobencarb. A synergistic response occurred for red rice control when imazamox was mixed with propanil plus thiobencarb at 3360 g ai ha−1 for all evaluation dates; however, imazamox mixed with propanil plus thiobencarb at 1680 g ha−1 resulted in synergism at the same evaluations except at 35 DAT with neutral response. Synergism was observed for barnyardgrass control with imazamox mixed with propanil plus thiobencarb at 3360 g ha−1 at 35 and 49 DAT. The only antagonism observed for barnyardgrass control was at 42 DAT with imazamox plus propanil at 840 and 1680 g ha−1 or mixed with the prepackage mixture at 1680 g ha−1. Rice treated with imazamox mixed with propanil plus thiobencarb at 3360 g ha−1 yielded 5770 kg ha−1.

Keywords

Propanilthiobencarbbarnyardgrass, Echinochloa crus-galli (L.) Beauv.red rice, Oryza sativa L.rice, Oryza sativa L.Antagonismneutral response
Type
Weed Management-Major Crops
Information
Weed Technology , Volume 31 , Issue 3 , June 2017 , pp. 373 - 379
Copyright
© Weed Science Society of America, 2017 

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Footnotes

Associate Editor for this paper: Jason Bond, Mississippi State University

References

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