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

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GWC-2 Understanding Glyphosate to Increase Performance

The Glyphosate, Weeds and Crops Series

Understanding Glyphosate to Increase Performance

GWC 2

Glyphosate and Roundup Ready® crops are popular because they provide consistent, broad spectrum weed control with minimal risk of crop injury. On occasion, however, growers experience poor weed control with glyphosate, generally because of application or weather?related factors.

Glyphosate products consist of a parent acid, salt, and proprietary components such as surfactants, defoamers, and other compounds that enhance foliar penetration of glyphosate and make the product more convenient to handle. Often the differences in performance among glyphosate products are due to the types and amounts of proprietary compounds included in the formulation.

This publication examines the factors that affect glyphosate performance and offers management strategies to minimize fluctuations in its effectiveness. It was written by Extension specialists from Iowa State, Purdue, Guelph and Wisconsin universities 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 orderUnderstanding Glyphosate to Increase Performance (GWC2) 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.