The following information is a Web Extra from the pages of Farm Journal. It corresponds with the article "Plan Your Weed Control Strategy” by Darrell Smith. You can find the article on page 27 in the Mid-February 2010 issue.
Most land-grant universities will provide up-to-date herbicide information in early editions of their spring newsletters, notes University of Illinois Extension weed science specialist Aaron Hager. Here are several such sites: