Evolution of Glyphosate Based Weed Management Systems in Minnesota
Agronomy & Pest Management
Ryan Miller
Extension Professor
University of Minnesota Extension
Rochester
Abstract
With the advent of Roundup Ready soybeans glyphosate became an integral component of weed management in Minnesota. Glyphosate adoption and utilization has been the focus of many extension research and outreach efforts. Efforts have been continually evolving, starting with variety testing of Roundup Ready soybeans and herbicide efficacy trials to determine optimal timing of herbicide application. These initial efforts were followed by educational programming stressing the importance of herbicide diversification to ensure the longevity of glyphosate in Minnesota cropping systems. More recently farmer concern over glyphosate resistant weeds has lead to experimentation and outreach with herbicide tank mixes and sequential herbicide applications for managing resistant weeds. Finally, efforts have moved to a different base herbicide program through the variety testing and herbicide program evaluation with Liberty Link soybeans. This paper will provide an overview of several research projects and explore the role of an extension educator in accomplishing these research and outreach efforts.
Authors: Miller, R.
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Miller, R. Crops Extension Educator, University of Minnesota Extension, Minnesota, 55904