Cowpea aphids are a recent addition to the alfalfa fauna of Iowa with our first damaging populations found in northwestern Iowa in late July 2002. Since then they have sporadically caused damage, mostly during dry conditions, but no damage has been widespread across the state. This year Kevin Black, agronomist with GROWMARK, Inc. in Illinois, reports large populations of this insect, plus pea aphids, in numerous fields along the Interstate 70 corridor.
Iowa State University
Rice, Marlin E., "Alfalfa aphid problems noted in central Illinois" (2006). Integrated Crop Management News. 1228.
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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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/.