• The 2009 ND Weed Control Guide contains .pdf files of the hardcopy version of Circular W253. This electronic version may contain more current information than the hard copy as new herbicide registrations are approved by EPA and herbicide pricing may change from the time the hardcopy was printed in mid-December, 2008.
• The e-version of the Michigan Vegetable Weed Guide contains sample pages. To view all pages of the guide, the guide must be purchased from The Extension Distribution Center at MSU.
• The USDA Weed Control Compendium was published in 1983 and lists weed control ratings from 2,4-D, MCPA, Mecoprop, 2,4-DB, dicamba, picloram, amitrole, and glyphosate.