Source: Weed Technology

Hugh J. Beckie, K. Neil Harker, Linda M. Hall, Frederick A. Holm and Robert H. Gulden (2011) Risk Assessment of Glyphosate Resistance in Western Canada
Weed Technology: January-March, Vol. 25, No. 1, pp. 159-164.
doi: 10.1614/WT-D-10-00080.1

Abstract

With increasing incidence of glyphosate-resistant weeds worldwide, greater farmer awareness of the importance of glyphosate stewardship and proactive glyphosate-resistance management is needed. A Web-based decision-support tool (http://www.weedtool.com) comprising 10 questions has been developed primarily for farmers in western Canada to assess the relative risk of selection for glyphosate-resistant weeds on a field-by-field basis. We describe the rationale for the questions and how a response to a particular question influences the risk rating. Practices with the greatest risk weighting in western Canadian cropping systems are lack of crop-rotation diversity (growing mainly oilseeds) and a high frequency of glyphosate-resistant crops in the rotation. Three case scenarios are outlined—low, moderate, and high risk of glyphosate-resistance evolution. Based on the overall risk rating, three best-management practices are recommended to reduce the risk of glyphosate resistance in weeds.

URL: http://www.wssajournals.org/doi/abs/10.1614/WT-D-10-00080.1

Website: http://www.wssa.net

Published: May 17, 2011