​​Giant Ragweed Management in Soybean

March 2015 | 26 min., 40 sec.
by Bill Johnson
Purdue University
https://doi.org/10.1094/GROW-SOY-03-15-113

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Summary

Giant ragweed is one of the most problematic weeds in the soybean producing areas of the US. Yield losses can approach 100% and development of populations that are resistant to ALS (Group 2), glyphosate (Group 9), and PPO (Group 14) herbicides have created additional challenges for minimizing the yield loss capability of this weed. This presentation will discuss various control methods for minimizing yield losses and weed seed production. It will highlight the importance of proper burndown herbicide selection, postemergence application timing, and the integration of burndown, residual, and postemergence herbicides for effective season-long control.​​

About the Presenter

Bill Johnson​ Bill Johnson received a BS degree in Agricultural Science from Western Illinois University, and MS and PhD degrees in Weed Science from the University of Arkansas. Dr. Johnson served as an Assistant Professor of Agronomy and Extension Weed Specialist at the University of Missouri until joining Purdue University in 2002. His current areas of emphasis in research and extension include the biology and management of glyphosate-resistant weeds and interactions between winter annual weeds and soybean cyst nematode. In addition to his research and extension responsibilities, Dr. Johnson teaches the senior seminar in plant sciences course for undergraduates in the Botany and Plant Pathology Department, and team teaches an advanced weed biology course with his colleagues at Purdue University.​

Contact Information:
Email: wgj@purdue.edu

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