Bakke, A.2021-02-252021-02-251949-08-01https://dr.lib.iastate.edu/handle/20.500.12876/95785<p>Canada thistle is resistant to 2,4-D. Many farmers using 2,4-D have killed the tops only to see new shoots come up from the roots.</p>articleisulib-bepress-aws-west143519996357farmscience/vol4/iss2/4Agriculture