Integrated Crop Management News
 

Document Type

Article

Publication Date

7-14-2003

Abstract

Soybean aphid populations are increasing in some fields in northeastern and central Iowa. Brian Lang, ISU field specialist-crops, reports that soybean aphids have increased dramatically during the past 2 weeks near Decorah. He found the first aphids on June 5 in soybean planted May 13. To give you a perspective of the increasing population, in his research plots, the average aphid density per plant for the past 4 weeks was 10 (June 16), 100 (June 22), 315 (June 30), and 640 (July 6). For soybean that was protected with a seed treatment, aphid populations on July 6 averaged 32 aphids per plant, or 95 percent less than the untreated plants. Palle Pedersen, ISU extension agronomist, also has found aphids to be abundant on some plants near Ames.

Copyright Owner

Iowa State University

Language

en

File Format

application/pdf

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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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