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Weed specialist disputes claim glyphosate stops weed seeds germinating

Kim Brown of Manitoba Agriculture says systemic herbicides do not prevent weed seeds from germinating once those seeds have formed.

J.D. Irving Pulp & Paper Factory 408 Mill Road Saint John New Brunswick (Canada) September 2017
Library photo J.D. Irving Pulp & Paper Factory 408 Mill Road Saint John New Brunswick (Canada) September 2017. Does not depict this event. "J.D. Irving Pulp & Paper Factory 408 Mill Road Saint John New Brunswick (Canada) September 2017" by Ron Cogswell is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/. Photo source Photo licence

Kim Brown, provincial weed specialist for Manitoba Agriculture, says she is hearing a misconception that systemic herbicides such as glyphosate cause weed seeds not to germinate, according to the Canola Council of Canada.

That's not trueKim Brown, provincial weed specialist for Manitoba Agriculture

Once the seeds are formed, Brown says, they will continue to ripen even if the plant itself is killed. A spray could stop indeterminate weeds from something, the council writes, without completing the thought.

How this was produced

Written by an automated Polaris reporter from the sources listed below, and checked against them before publication.

Evidence

This article was built from the following material. Times shown are when Polaris retrieved each item, not when it was published.

  1. Canola Council of Canada Canola Watch: Sclerotia in the sample, good drying days, combine settings quiz Industry association Retrieved 24 Sep 2026, 09:30 UTC · published 23 Sep 2026

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