Roundup-resistant ragweed confirmed in Ont.
Glyphosate-resistant giant ragweed is officially in Ontario, weed scientist Peter Sikkema confirmed Tuesday. Researchers grew plants from seeds of giant ragweed found in farmers’ fields in the southwestern part of the province in 2008 and the resulting weeds were resistant to glyphosate, Sikkema said at a farmers’ meeting at Uxbridge, […]