To receive weekly email notification when the latest issue of the Bulletin is online, click on this link and fill out the form.

No. 18/July 27, 2001

Click here to download the print-ready PDF of this week's issue.
Note: To view PDF files, you need the free Adobe Acrobat Reader.

Preliminary Root-Rating Results for Urbana Corn Rootworm Trial
On July 16, a crew dug and washed roots from an experimental corn rootworm trial located just south of Champaign-Urbana. The following day, we rated the roots for larval injury. This article presents some of the preliminary results.

Natural Controls Suppress Soybean Aphid Populations
Pope and Hardin counties have now been added to the growing list of counties with confirmed soybean aphid populations. Recent reports suggest that natural enemies may be playing a major role in controlling soybean aphids. Treating a field for soybean aphids may not only be ineffective, it may be detrimental.

Adult Corn Rootworm Suppression Programs: Some Comments
Earlier this week a joint team of entomologists from Purdue University and the University of Illinois dug and evaluated roots from the USDA-ARS-sponsored areawide corn rootworm suppression experiment, located just south of Sheldon, Illinois. The roots were rated for injury to assess the performance of an adulticidal bait that was applied in 2000.

One of the basic goals of the experiment is to suppress the overall corn rootworm population across an area to reduce the amount of insecticide that may be required to manage this pest in subsequent years.

Spider Mites Prove Challenging in Dry Areas of the State
Infestations of twospotted spider mites continue to plague soybean producers in several of the drier areas of the state. Mite densities will continue to explode in drought-stressed soybean fields. Treating border rows may be a cost-effective management approach instead of spraying entire fields.

Corn and Soybean Classic Meetings Scheduled for January 2002
The regional Corn and Soybean Classic Meetings are scheduled for January 2002. This article provides meeting dates and locations.

Regional Reports
Extension Center educators, Unit educators, and Unit assistants in northern, west-central, east-central, and southern Illinois prepare regional reports to provide more localized insight into pest situations and crop conditions in Illinois. The reports will keep you up to date on situations in field and forage crops as they develop throughout the season.

This week's issue includes reports from northern, southern, and west-central Illinois.

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

Subscription information: Phone (217) 244-5166 or email
Comments or questions regarding this web site: