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Issue No. 1/March 18, 2004

A New Look for the Bulletin on the Web
Users of the Web version of the Bulletin will see a new look and some new features for 2004, including searchability. Issues from 2003 and earlier will be migrated during 2004 to the new address on the IPM Web site (http://www.ipm.uiuc.edu/bulletin). User feedback is requested to help make the site as useful as possible.

Internet Source for Daily Pest Degree-Days and Growing Degree-Days in Illinois
Another new online tool allows users to determine degree-day accumulations for selected pests throughout the season.

Hines Captures the First Black Cutworm Moth of 2004
Ron Hines captured one black cutworm moth in Pope County on March 9. Reports of his captures throughout the season are available online.

Warmer Winter for Corn Flea Beetles: Early-Season Stewart's Wilt Predictions
Variable winter temperatures across Illinois have resulted in varying predictions of Stewart's wilt in corn this spring. Projected risk of early-season wilt and late-season blight based on average temperature plus predictions of early-season wilt for 9 Illinois locations are provided.

Insect Monitoring Network
Extension educators and volunteer cooperators monitor traps and provide weekly counts on black cutworm, corn earworm, and European corn borer; data is reported on the IPM Web site. New cooperators are always sought.

Searching for Wireworms: The Use of Solar Bait Stations
Simple-to-make solar bait stations remain the best way to know whether wireworms pose a threat to corn. Directions for constructing and monitoring a station are provided along with a list of soil insecticides and seed treatments labeled for control of wireworm in corn.

Soybean Aphids in 2004?
Though accurate prediction isn't possible, some clues suggest that soybean aphids may not be as troublesome in 2004 as they were in 2003. Slide sets addressing soybean aphids in Illinois, Iowa, Minnesota, and Wisconsin are available for viewing at the IPM Web site.

Seed Treatments and Bt Corn Rootworm Hybrids: Perspectives on Control and Influence on Nontarget Populations
Increased use is anticipated of systemic insecticidal seed treatments Poncho and Cruiser for corn rootworm and secondary soil insect control. Efficacy trials will continue in an effort to document the products' performance under varying environmental and planting conditions.

Development of Economic Thresholds: Show Us the Science
Science-based approaches remain in short supply to address the challenge of corn rootworm larval injury in first-year cornfields. Recent on-farm surveys confirm that not every field warrants an insecticide treatment. Illinois Extension specialists also continue to argue against using broadcast insecticidal treatments in soybean fields to suppress egg laying by variant western corn rootworm adults.

Corrections to the 2004 Illinois Agricultural Pest Management Handbook
Several corrections are detailed.

Product Updates in Weed Management
No new herbicide active ingredients are expected to be labeled during the 2004 growing season. Formulation and label changes are presented by manufacturer.

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

Internet Source for Daily Pest Degree-Days and Growing Degree-Days in Illinois
Another new online tool allows users to determine degree-day accumulations for selected pests throughout the season.