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A Midsouthern Consultant’s Survey on Weed Management Practices in Soybean

  • Lauren M. Schwartz-Lazaro (a1), Jason K. Norsworthy (a2), Lawrence E. Steckel (a3), Daniel O. Stephenson (a4), Mandy D. Bish (a5), Kevin W. Bradley (a6) and Jason A. Bond (a7)...

Abstract

Soybean consultants from Arkansas, Louisiana, southeast Missouri, Mississippi, and Tennessee were surveyed in 2016 to assess weed management practices and the prevalence of herbicide-resistant weeds in midsouthern U.S. soybean production. The consultants surveyed represented 13%, 28%, 8%, 16%, and 5% of the total soybean area planted in Arkansas, Louisiana, southeast Missouri, Mississippi, and Tennessee, respectively. Of the total scouted area, 78% of the consultants said their growers planted glyphosate-resistant soybean in 2016, with 18% planting glufosinate-resistant (LibertyLink®), primarily due to familiarity with and cost of the technology. Although 94% of the consultants determined that glufosinate was most effective on killing Palmer amaranth, the primary concern associated with controlling herbicide-resistant weeds was the associated cost, followed by return profit and time constraints. Palmer amaranth, morningglory species, horseweed, barnyardgrass, and Italian ryegrass were the five most problematic weeds in soybean across the five states. Palmer amaranth was the most problematic and important weed in each state individually. The increased concern (77% of consultants) with this species was attributed to the rising concern with and occurrence of protoporphyrinogen oxidase–resistant Palmer amaranth. Consultants were of the opinion that more research was needed on cover crops and the new traited technologies in order to improve weed management in soybean.

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Corresponding author

Author for correspondence: Lauren M. Schwartz-Lazaro, School of Plant, Environmental, and Soil Sciences, Louisiana State University, Baton Rouge, LA 70803. (Email: llazaro@agcenter.lsu.edu)

References

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A Midsouthern Consultant’s Survey on Weed Management Practices in Soybean

  • Lauren M. Schwartz-Lazaro (a1), Jason K. Norsworthy (a2), Lawrence E. Steckel (a3), Daniel O. Stephenson (a4), Mandy D. Bish (a5), Kevin W. Bradley (a6) and Jason A. Bond (a7)...

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