New Weeds from the South
Clip: Season 21 Episode 4 | 6m 3s | Video has closed captioning.
Climate change means new and stronger weeds. 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.
Aired: 03/20/13
