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No. 18/July 26, 2002

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Remember Agronomy Day on August 22
On August 22, the Department of Crop Sciences and the College of ACES will "roll out the red carpet" for folks across Illinois who are eager to interact with scientists prepared to discuss their most recent research findings at the 46th Annual Agronomy Day. The topics cut across all aspects of the most current crop production and protection issues.

Commentary on Corn Rootworm Management in Soybeans
While in DeKalb, we learned that producers in nearby counties were becoming increasingly concerned about the level of first-year corn rootworm injury they were experiencing in recent years. Some have inquired whether or not it makes economic sense to treat western corn rootworm adults in soybean fields in an attempt to prevent egg laying. As readers of the Bulletin should know by now, we do not support this management tactic for the western corn rootworm variant.

Late-July Insect Management Opportunities
Calls and e-mails into our office at this point in the summer are dominated by questions concerning the following pests: Japanese beetles, twospotted spider mites, corn leaf aphids, soybean aphids, corn rootworm larval damage, and corn rootworm adults and silk clipping in late-planted corn. This article contains a few comments about each of these pests.

Stem Canker of Soybean
This is the time of the year when stem canker can appear in soybean fields. Stem canker can be a serious problem under conditions that favor this disease. This article covers some basic information pertaining to stem canker.

New Source of Information on Soybean Rust
Soybean rust is an exotic fungal disease that has not been detected in the continental United States. Regardless, this disease is of interest to many people because it may have the potential to cause considerable damage to soybean crops in the Midwest. Soybean rust is causing crop losses in the Southern Hemisphere and may eventually reach the continental United States.

For those interested in obtaining more information on soybean rust, the U.S. Department of Agriculture Animal and Plant Health Inspection Service has developed a soybean rust pest alert Web site.

Venturing Into the Fields
Crop conditions have improved considerably over the past 2 weeks in those fields that received rain; but many fields didn't receive rain, and conditions continue to deteriorate. Rains early this week were not nearly as widespread as we had hoped they would be, but they might move the ratings up a bit.

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 east-central, northern, and west-central Illinois.

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

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