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Effect of Pyroxasulfone Application Timing and Rate on Soybean

Published online by Cambridge University Press:  15 March 2017

Daniel O. Stephenson IV ,
David C. Blouin ,
James L. Griffin ,
Randall L. Landry ,
Brandi C. Woolam  and
John M. Hardwick
Daniel O. Stephenson IV*
Affiliation:
Associate Professor, former Research Associate, and Research Associate, Louisiana State University Agricultural Center, Dean Lee Research and Extension Center, Alexandria, LA 71302
David C. Blouin
Affiliation:
Professor, Department of Experimental Statistics, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
James L. Griffin
Affiliation:
Professor Emeritus and former Graduate Research Assistant, School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
Randall L. Landry
Affiliation:
Associate Professor, former Research Associate, and Research Associate, Louisiana State University Agricultural Center, Dean Lee Research and Extension Center, Alexandria, LA 71302
Brandi C. Woolam
Affiliation:
Associate Professor, former Research Associate, and Research Associate, Louisiana State University Agricultural Center, Dean Lee Research and Extension Center, Alexandria, LA 71302
John M. Hardwick
Affiliation:
Professor Emeritus and former Graduate Research Assistant, School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
*
*Corresponding author’s E-mail: dstephenson@agcenter.lsu.edu
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Abstract

Weed-free field experiments were conducted to evaluate soybean injury, growth, and yield following PRE or POST pyroxasulfone application. Soybean was injured 1 and 15% following pyroxasulfone PRE and POST application, respectively, 7 d after treatment (DAT). Injury following PRE and POST application was observed as delayed emergence and leaf necrosis and crinkling, respectively. Injury ranged from 0 to 6% following both application timings 14 and 28 DAT. Soybean was injured 5% or less following 60, 120, 180, 240, and 300 g ha−1 of pyroxasulfone. Soybean plant population, height, and yield were not affected by pyroxasulfone application timing. Only 300 g ha−1 of pyroxasulfone reduced soybean plant population to 90% of the nontreated 30 d after PRE. Pyroxasulfone rate did not influence soybean heights and yield. Data indicates that pyroxasulfone can safely be applied to soybean without a detrimental effect on plant growth or yield.

Se realizaron experimentos de campo en condiciones libres de malezas para evaluar el daño, el crecimiento y el rendimiento de la soja después de aplicaciones PRE o POST de pyroxasulfone. La soja fue dañada 1 y 15% después de aplicaciones PRE y POST de pyroxasulfone, respectivamente, 7 d después del tratamiento (DAT). El daño que siguió a las aplicaciones PRE y POST fue observado como un retraso en la emergencia y necrosis y arrugamiento foliar, respectivamente. El daño varió desde 0 a 6% después de ambos momentos de aplicación, 14 y 28 DAT. La soja fue dañada 5% o menos con 60, 120, 180, 240, y 300 g ha−1 de pyroxasulfone. La población, altura, y rendimiento de la soja no fueron afectados por el momento de aplicación de pyroxasulfone. Solamente 300 g ha−1 de pyroxasulfone redujo la población de la soja a 90% del testigo sin tratamiento 30 d después de PRE. La dosis de pyroxasulfone no influenció la altura de la soja ni el rendimiento. Los datos indican que pyroxasulfone puede ser aplicado en forma segura a la soja sin causar efectos negativos sobre el crecimiento de la planta ni el rendimiento.

Keywords

Glyphosatepyroxasulfonesoybean, Glycine max (L.) Merr.Soybean phytotoxicitysoybean growthsoybean yield.
Type
Weed Management-Major Crops
Information
Weed Technology , Volume 31 , Issue 2 , March 2017 , pp. 202 - 206
Copyright
© Weed Science Society of America, 2017 

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Footnotes

Associate Editor for this paper: William Johnson, Purdue University.

References

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