MORE GLYPHOSATE RESISTANCE

Following up their work from last spring which confirmed the first finding of a glyphosate-resistant weed in Canada, University of Guelph weed scientists have now confirmed the presence of additional glyphosate-resistant populations in soybean fields in southwestern Ontario. Greenhouse testing of seed samples collected from 57 fields in southwestern Ontario counties of Essex, Kent and Lambton in the fall of 2009 showed that an additional 16 fields had populations of giant ragweed (Ambrosia trifida) resistant to glyphosate.

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