Most Iowa winters are harsh on overwintering bean leaf beetles. Typical statewide overwintering mortality ranges from 60-99 percent (see a 20-year historical record of predicted bean leaf beetle mortality in central Iowa.) A combination of cold winter temperatures and the high adoption of insecticidal seed treatments have drastically curbed bean leaf beetle populations throughout much of the state.
Iowa State University
Hodgson, Erin W. and Sisson, Adam J., "Mild Winter for Bean Leaf Beetle" (2012). Integrated Crop Management News. 164.
The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.