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Effect of Pyroxasulfone Application Timing and Rate on Soybean

  • Daniel O. Stephenson (a1), David C. Blouin (a2), James L. Griffin (a3), Randall L. Landry (a1), Brandi C. Woolam (a1) and John M. Hardwick (a3)...

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.

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*Corresponding author’s E-mail: dstephenson@agcenter.lsu.edu

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

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References

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Keywords

Effect of Pyroxasulfone Application Timing and Rate on Soybean

  • Daniel O. Stephenson (a1), David C. Blouin (a2), James L. Griffin (a3), Randall L. Landry (a1), Brandi C. Woolam (a1) and John M. Hardwick (a3)...

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