University of Nebraska—Lincoln Extension GWC9 Biology and Management of Horseweed

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GWC-1 Facts About Glyphosate-Resistant Weeds

The Glyphosate, Weeds and Crops Series

Facts About Glyphosate-Resistant Weeds

GWC 1

Heavy reliance on glyphosate for weed control has resulted in a serious concern for the long-term viability of this weed management tool and the development of weeds resistant to glyphosate.

This publication explores the transition in glyphosate use from when it was introduced in the mid 1970s for burndown and perennial weed control in corn and soybeans to its current use after the introduction of Roundup Ready crops in 1996. Topics covered include: consequences of resistance; principles of glyphosate resistance; tolerance, resistance and nonperformance; and glyphosate resistance management.

This publication addresses the status and potential consequences of glyphosate-resistant weeds and the primary factors that increase the risk of glyphosate resistance. This publication also encourages growers to use practices that reduce the selection for glyphosate-resistant weeds. It was written by Extension specialists at the University of Wisconsin and Iowa State University and reviewed by a national team of Extension specialists. It was published by Purdue University as part of the Glyphosate, Weeds and Crops Series.

To order

Facts about Glyphosate-Resistant Weeds (GWC1) is available from your local UNL Extension office or from the UNL Extension Publications Warehouse. In addition, a pdf copy is available on the Purdue University Extension Web site. Cost is $3.

Extension is a Division of the Institute of Agriculture and Natural Resources at the University of Nebraska–Lincoln cooperating with the Counties and the United States Department of Agriculture.

University of Nebraska–Lincoln Extension educational programs abide with the nondiscrimination policies of the University of Nebraska–Lincoln and the United States Department of Agriculture.