Fruit & Vegetable Magazine

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Glyphosate resistant weed update


December 19, 2012
By Kristen Callow OMAFRA weed management program lead for horticulture

Topics
Giant ragweed

December 19, 2012 – There has been a lot of work conducted by Dr. Peter Sikkema, Dr. Francois Tardif and many graduate students (Joe Vink, Holly Byker, Joanna Follings) at the University of Guelph to determine the extent of glyphosate resistant weeds in Ontario and potential management options.

Currently, there are three species with resistance to glyphosate in Ontario, giant ragweed since 2008 (71 locations), Canada fleabane since 2010 (84 total locations) and common ragweed (1 location). READ MORE

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