Herbicide resistance: it's a major concern in Canada, with the list of resistant weeds growing. Where it exists, waterhemp is one of the biggest concerns, given its ability to rapidly evolve resistance and current four-way resistant populations.

In this episode, Top Crop Manager associate editor Alex Barnard chats with Peter Sikkema and Kim Brown-Livingston about multiple-resistant waterhemp. Sikkema, professor of weed management at the University of Guelph, Ridgetown Campus, discusses the spread of multiple-resistant waterhemp in Ontario and how to manage it, chemically and with other tactics. Brown-Livingston, crop specialist, weeds, with Manitoba Agriculture and Resource Development, emphasizes the importance of preventing further spread of this tier one noxious weed in the province.

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