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Glyphosate-Resistant Weed Discovered
May 7, 2009
OAC researchers have found a giant ragweed biotype that is showing resistance to the popular herbicide glyphosate. The plants are able to survive glyphosate use rates that kill normal susceptible weeds.
Plant Agriculture professor, Francois Tardif, says, "We've seen a difference in control of this giant ragweed biotype than what is normally expected when sprayed with glyphosate." The plants were still able to grow after an application of the herbicide at recommended levels, whereas susceptible ragweed did not survive.
"Glyphosate has become a tool of choice for the control for many weeds, so the appearance of a glyphosate-resistant population can complicate management for growers," added Peter Sikkema, a plant agriculture professor at the Ridgetown campus, who conducted the research with Tardif.
