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1 March 2017 Effect of Pyroxasulfone Application Timing and Rate on Soybean
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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.

Nomenclature: Glyphosate; pyroxasulfone; soybean, Glycine max (L.) Merr.

© Weed Science Society of America, 2017
Daniel O. Stephenson, David C. Blouin, James L. Griffin, Randall L. Landry, Brandi C. Woolam, and John M. Hardwick "Effect of Pyroxasulfone Application Timing and Rate on Soybean," Weed Technology 31(2), 202-206, (1 March 2017).
Received: 18 October 2016; Accepted: 1 November 2016; Published: 1 March 2017

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