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First glyphosate resistance in western Canada

Canadian government researchers have confirmed the presence of the first glyphosate-resistant weeds in western Canada. The Agriculture and Agri-Food Canada scientists found glyphosate-resistant kochia ( Kochia scoparia) in three fields in southern Alberta last year. The two other weed species with resistance to glyphosate in Canada were found in Ontario. They were giant ragweed ( Ambrosia trifida) in 2009 and Canada fleabane ( Conyza canadensis) in 2011. Monsanto says that it has worked with the researchers on the resistance findings and will develop recommendations for affected farmers. It stresses that the kochia resistance was detected in “chem-fallow” fields rather than in glyphosate-tolerant Roundup Ready crops.

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