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Weed Management Programs with Pyroxasulfone in Field Corn (Zea mays)

Published online by Cambridge University Press:  10 August 2017

Daniel O. Stephenson IV
Affiliation:
Associate Professor and Research Associates, Louisiana State University Agricultural Center, Dean Lee Research and Extension Center, Alexandria, LA 71302
Jason A. Bond
Affiliation:
Professor and Research Associate, Mississippi State University, Delta Research and Extension Center, P.O. Box 197, Stoneville, MS 38776
James L. Griffin
Affiliation:
Professor Emeritus and former Graduate Student, School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
Randall L. Landry
Affiliation:
Associate Professor and Research Associates, Louisiana State University Agricultural Center, Dean Lee Research and Extension Center, Alexandria, LA 71302
Brandi C. Woolam
Affiliation:
Associate Professor and Research Associates, Louisiana State University Agricultural Center, Dean Lee Research and Extension Center, Alexandria, LA 71302
H. Matthew Edwards
Affiliation:
Professor and Research Associate, Mississippi State University, Delta Research and Extension Center, P.O. Box 197, Stoneville, MS 38776
John M. Hardwick
Affiliation:
Professor Emeritus and former Graduate Student, School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
Corresponding

Abstract

Field experiments were conducted in Louisiana and Mississippi from 2011 through 2013 to evaluate crop injury, weed control, and yield in field corn following pyroxasulfone applied PRE and POST. Pyroxasulfone PRE or POST did not injure corn at any evaluation. Barnyardgrass control was not improved with the addition of any POST treatment to pyroxasulfone alone or atrazine plus pyroxasulfone PRE; however, all POST treatments increased barnyardgrass control to at least 95% at all evaluations following atrazine PRE. All treatments that contained a PRE followed by POST application controlled browntop millet ≥90% at all evaluations. All POST treatments increased ivyleaf morningglory control to ≥92% following atrazine or pyroxasulfone alone PRE. However, control with atrazine plus pyroxasulfone PRE was similar or greater 28 d after POST than all treatments that received a POST application. In the absence of a POST treatment, pyroxasulfone or atrazine plus pyroxasulfone PRE controlled Palmer amaranth 93 to 96% at all evaluations, but atrazine alone PRE provided 84, 82, and 66% control 7, 14, and 28 d after POST, respectively. All programs that contained a PRE followed by POST herbicide treatment controlled Palmer amaranth >90% at all evaluations. Corn yield following all treatments except atrazine alone PRE and the nontreated were similar and ranged from 10990 to 12330 kg ha−1. This research demonstrated that pyroxasulfone can be a valuable tool for weed management in a corn weed management program.

Type
Weed Management-Major Crops
Copyright
© Weed Science Society of America, 2017 

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Footnotes

Associate Editor for this paper: William Johnson, Purdue University

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