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No. 21/August 16, 2002

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Last Seasonal Issue of the Bulletin for 2002
This issue of the 2002 Bulletin is the last one that will be published before September. Issue numbers 22, 23, 24, and 25 will be published on September 6, October 4, November 8, and December 6, respectively. Thanks to all of you who provided reports throughout the growing season.

Wheat Seed Treatments for Fall 2002
Many variables come into play when deciding whether or not seed treatments pay off. Because many of these variables are difficult to predict with much accuracy before planting, most folks looking for "cheap insurance" either plant wheat a little heavier or use an inexpensive seed treatment. Just like car insurance, you buy the coverage you need based on product performance, your particular situation, and your desired comfort level.

Survey of First-Year Corn Rootworm Damage Continues
By analyzing survey data, we hope to improve our understanding of the continuing spread of first-year corn rootworm problems across much of the state.

What's the Scoop on Soybean Aphids?
Populations of soybean aphids have failed to build to very large numbers this year throughout most of the Midwest. Although no one has a definitive answer for the lower numbers of soybean aphids this year, weather probably has played a major role in suppressing populations of this invasive species in 2002. However, only after considerable discussion among the experts will we learn why soybean aphids were so "quiet" this year.

Don't Ignore Injury to Soybean Pods
By mid-August, it's time to begin checking soybean fields for pod injury that can be caused by a variety of insect pests. Bean leaf beetles, grasshoppers, and stink bugs are all capable of causing yield losses in soybean fields during the pod-fill stage of development. So although it has been a long, hot summer, don't neglect to scout soybeans now and well into early September for these insect pests.

Sudden Death Syndrome--What's Up with Those Roots?
In many areas of the state, foliar symptoms of SDS have not yet begun to appear and may not appear in fields planted late in May or early June. This pathogen still has many unknown factors about how it is causing disease on soybeans. Our research shows that the root system plays an important role in soybean plants' resistance to SDS; however, more research is needed to specifically identify that role.

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 and west-central Illinois.

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

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