The alfalfa weevil article published on May 3, 2010 in the ISU Extension Integrated Crop Management News included predicted dates for scouting for the alfalfa weevil larvae in Iowa. The article used degree days that were obtained from the web-based climate service Midwestern Regional Climate Center.
Iowa State University
Sisson, Adam and Hodgson, Erin W., "CORRECTION to Alfalfa Weevil Scouting Update 2010" (2010). Integrated Crop Management News. 450.