The 2013 Herbicide Guide for Iowa Corn and Soybean Production (WC 94) can now be accessed from the Iowa State University Weed Science web page. The publication provides an update of new herbicide products as well as an herbicide effectiveness chart for herbicides used in soybean and corn. Herbicide site of action and injury symptoms are described and information about herbicide group numbers is included. A list of prepackage mixtures of herbicides is included. The current herbicide resistant weed situation in Iowa is described and a discussion about Palmer amaranth is provided.
If you have questions about WC 94 or other aspects of weed management, please contact Mike Owen at mdowen@iastate.edu or Bob Hartzler at hartzler@iastate.edu.
Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on January 30, 2013. The information contained within may not be the most current and accurate depending on when it is accessed.