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Management of Glyphosate-Resistant
Palmer Amaranth in Soybeans
September 2014

By Alan York, Ph.D.
William Neal Reynolds Professor Emeritus
North Carolina State University
Phone: 919-515-5643


Executive Summary
(3 min 48 sec)

Full Presentation
(26 min 43 sec)


for PC, Mac, and
Mobile Devices


for iPhone

for PC, Mac, and
Mobile Devices


for iPhone


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Summary: This presentation will help growers, consultants, dealers, and other practitioners in soybean-producing areas manage herbicide-resistant weeds in general and glyphosate-resistant Palmer amaranth in particular. Specifically, this presentation will cover some of the basic biology and physiology of Palmer amaranth and how that contributes to this plantís success as a weed. Basic herbicide resistance management strategies will be discussed, and specific management programs for Palmer amaranth will be presented. The information presented will help growers avoid resistance, or if glyphosate-resistant Palmer amaranth is already present, the information will help growers effectively manage the problem.

Responsibility: United Soybean Board (USB) farmer-leaders develop and maintain partnerships with U.S. land grant universities and U.S. ag-focused research organizations such as the Plant Management Network to increase the transfer of checkoff-funded applied and practical production research information to U.S. soybean farmers. USB neither recommends nor discourages the implementation of any advice contained herein, and is not liable for the use or misuse of the information provided.

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