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More News About the Soybean Aphid

June 22, 2001
In last week's issue of the Bulletin, Mike Gray indicated that entomologists at the University of Minnesota believed they had found active soybean aphid colonies in four soybean fields in a county in the southeastern region of the state. However, the species of aphids has not been confirmed by David Voegtlin, aphid specialist with the Illinois Natural History Survey. In the meantime, Chris DiFonzo, an extension entomologist at Michigan State University, has reported finding aphids on June 15 in a 3-acre research plot on the Michigan State University campus. The soybean plants were at stage V1. Among the aphids she found were an alate (winged adult) with four nymphs and three apterous (wingless) adults with 20 nymphs. Again, the species has not been confirmed by David Voegtlin.

These are small beginnings, but they are notable. And as I write this article, a couple of teams of entomologists and summer employees are on their way to survey for aphids in soybeans in northern Illinois. If they find anything, we will inform you as soon as possible.

You also might be interested in two Web sites that will include reports of soybean aphids this year. The Soybean Aphid On-line Reporting and Mapping System, described in the following article, is located at the North Central Pest Management Web site. Data at this Web site will come from states throughout the Midwest and will be rather specific. The Illinois IPM Web site also includes a reporting form for soybean aphids captured in our network of suction traps at seven locations in the state: soybeans/aphids/index.html. Thus far we have not captured any flying soybean aphids. However, the report is updated weekly, so you might want to check it out when you get a chance.

As reports of aphids in soybean fields, confirmations of aphid species, and results from surveying and trapping accumulate, we'll provide the information in the Bulletin. Don't hesitate to contact us if you believe you have found aphids in soybean.--Kevin Steffey

Author: Kevin Steffey

The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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