Integrated Crop Management News

Document Type


Publication Date



On June 18, 2001 Brian Lang, extension specialist in crops, found soybean aphids on V1-stage soybean plants near Decorah in northeastern Iowa. He noted that aphids were common in fields in river floodplains. The highest density was 20 aphids per plant and most of the aphids were clustered on the youngest unexpanded trifoliate leaf. He did not find aphids on hilltop fields even though the fields had woodlands nearby that might harbor their alternate host, buckthorn. Next week I will have additional information on aphid biology, scouting, and management decisions.

Copyright Owner

Iowa State University



File Format





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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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