Improving the ability to predict emergence timing of weeds in row crops has been a major research emphasis at Iowa State University in recent years. The latest product of this research is a poster called Weed emergence sequences: Knowledge to guide scouting and control. It depicts the emergence sequence of 16 important weeds of the northern Corn Belt. This poster is available in 18" by 24" and 8.5" by 11" formats. Single copies of each poster are free. Multiple copies of the large poster are $1.00 and the smaller poster, $0.25, plus shipping and handling if mailed.