Can herbicide control thistles? – Mike Kuklinsk

Bull thistle and Canada thistle are two problem weed species that threaten the Biocore Prairie. Mike tested whether careful spot treatments with the non-specific herbicide RoundUp can kill (or severely weaken) thistles without damaging the surrounding plants. He also investigated whether thistles treated with RoundUp resprouted. Mile kept track of all of the plants in the treatment plots over the course of the summer of 2002.