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U.S. Department of Agriculture
National Invasive Species Information Center
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Invasive Species Resources

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The Wisconsin Gardener - New Weeds from the South (2013)

Wisconsin Public Television.
Climate change means new and stronger weeds. In this video, University of Wisconsin-Extension weed specialist Mark Renz shows how climate change will turn some of our existing weeds such as Canada thistle into super weeds. Plus, a look at some new weed threats from the south.