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No. 21/August 25, 2000

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IN THIS ISSUE:
Illinois Grain Storage Teleconference, September 5, 2000, 7-10 p.m.
To answer producers' questions about coping with the big fall harvest, University of Illinois Extension is holding a statewide teleconference on September 5 at 7:00 p.m. Experts in integrated pest management, agricultural economics, and agricultural engineering will be presenting the latest information on post-harvest grain protection and storage methods.

More News on the Soybean Aphid in Illinois
Almost as quickly as the soybean aphid was discovered and news hit the streets, the numbers of aphids in soybean fields in northern Illinois have declined significantly. Heavy rainfalls in some areas washed aphids off the plants, but natural control, by predators and a pathogenic fungus, was the primary reason for the rapid decrease in densities of aphids.

Since our last report, we have learned that the soybean aphid has been found in Minnesota. But the most important news for us in Illinois is that three Illinois researchers believe they have found the soybean aphid in a few fields in Champaign and Vermilion counties in east-central Illinois.

This article contains links to information about this aphid on the Web.

Bean Leaf Beetles Are Plentiful in Some Soybean Fields
Many observers have reported finding lots of bean leaf beetles in soybeans during the past couple of weeks. Marlin Rice, Extension Entomologist at Iowa State University, reported that numbers of bean leaf beetles had "hit the roof" in Iowa. This article contains information from RiceŇs article in Iowa State University's Integrated Crop Management newsletter. The article also discusses insecticides and their respective preharvest intervals for control of bean leaf beetles.

Here We Go Again: Bt Corn and Monarch Butterflies
CBS Evening News aired yet another story about Bt corn and monarch butterflies on Monday, August 21. The controversy this time was generated from a paper published electronically for the journal Oecologia by Laura C. Hansen Jesse and John J. Obrycki at Iowa State University. This PMCDB article includes the abstract of the paper and a response from Dr. Val Giddings, Vice President for Food and Agriculture of the Biotechnology Industry Organization (BIO).

Sudden Death Syndrome FAQs
It has turned into a banner year for sudden death syndrome (SDS) on the soybean crop. This article includes answers to these frequently asked questions:

How much yield loss can we expect from plants showing SDS symptoms in the top 1/3 to 1/2 of the plant?
Does the plant die? Will the pods continue to fill if the tops drop their leaves?
SDS appears to be worse near the gateways and in areas that are used to park tandems for filling at harvest. Is this related to compaction?
How long does it take for a plant to die?
My soybeans were all planted early, and there doesn't seem to be a difference in varieties or brands, or if they were supercoated or not. Why?
Are no-till soybeans more susceptible to SDS?
Should we plan to use SCN-resistant soybeans on these fields in crop year 2002?
Are Roundup-Ready soybeans more susceptible?


Wheat Diseases: Reflecting and Planning
The 2000 wheat crop might be remembered as being one of the higher average yields produced in Illinois, but several fall and spring diseases caused concern and, in some cases, stole some bushels from the Illinois wheat crop again. This article focuses heavily on the viral diseases and what adjustments might be made to help reduce their impact on the upcoming wheat crop.

The article discusses cultural control and variety selection.

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 Illinois, southern Illinois, and west-central Illinois.



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

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