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Issue No. 21/August 12, 2005

Last In-Season Issue of the Bulletin
This is the last in-season issue for 2005; monthly issues will be published in September, October, November, and December.

University of Illinois Agronomy Day, August 18, 2005
Displays and four tours will highlight the activities for Agronomy Day at the University of Illinois Crop Sciences Research and Education Center on Thursday, August 18.

Will the Soybean Aphid Situation in 2003 Repeat Itself in 2005?
Despite similar densities of soybean aphids per plant, there are some significant differences between the current soybean aphid situation in Illinois and the outbreak in 2003. Fields throughout Illinois still need to be scouted.

A Little More Information About Twospotted Spider Mites
Population densities of twospotted spider mites are crashing in some locations; determine densities in deciding whether applying a miticide this late in the summer is necessary.

Reminder About Soybean Pod Feeders
While there are no reports yet this season of significant feeding caused by grasshoppers, bean leaf beetles, and stink bugs, they are known for their potential to reduce soybean yields by feeding on soybean pods.

Western Corn Rootworm Adults Abundant in Some Soybean Fields
If you haven't deployed yellow sticky traps in soybean fields to monitor western corn rootworm adults, don't delay, especially in more southern and western regions of Illinois.

Susceptibility of Western Corn Rootworm First-Instar Larvae to Cry3Bb1 Protein
Researchers continue to learn more about the biology and ecology of the variant western corn rootworm and the responses of corn rootworms in general to the Cry3Bb1 protein.

New Field Assessment Key for Asian Soybean Rust Management
A new assessment card is available to help producers assess what percentage of soybean rust infection is present on soybean leaves.

Wheat Seed Treatments for Fall 2005
Guidelines are provided regarding efficacy of various wheat seed treatment fungicide active ingredients, together with a list of common wheat seed treatment fungicides and insecticides.

Crops in August: Moving Toward the Finish Line
Crop condition ratings continue to suffer, topsoil moisture is short over most of Illinois, and organized, general rainfall is nowhere in the forecast. Does this sound familiar?

Regional Reports
Reports are provided this issue for northern, southern, and west-central Illinois.