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Issue No. 7/May 12, 2006

Soybean Rust and Nematodes Discussed at Crop Session
A workshop will be held Wednesday morning, June 7, at the Northern Illinois Agronomy Research Center, Shabbona, addressing soybean rust and nematodes.

Small Grains Program to Be Held June 22
A program on wheat management and wheat and oat variety selection will be presented Thursday evening, June 22, at the Northern Illinois Agronomy Research Center in Shabbona.

Weed Science Field Tour
This year's University of Illinois Weed Science Field Day will be held Wednesday morning, June 21, at the Crop Sciences Research and Education Center.

Plenty of White Grubs Being Found in Cornfields
Numerous reports of white grubs in cornfields are coming in, though little injury to seedlings has been observed. Despite repeated trials, little has yet been learned about the efficacy of selected soil and seed-applied insecticides against Japanese beetle grubs.

Bean Leaf Beetles Deserve Attention on Early-Planted Soybeans
Early-planted soybeans should be scouted vigilantly for bean leaf beetles, but there is little reason to assume that the beetles will infect seedling soybeans with bean pod mottle virus.

Potato Leafhoppers Have Arrived in Some Alfalfa Fields
Potato leafhoppers not only reduce alfalfa yields, but they also may have a significant negative effect on the nutritional quality of hay and may impair the vigor of a stand. Begin scouting now and continue at least weekly throughout the growing season.

Survey of Buckthorn Reveals Low Soybean Aphid Overwintering Densities
Results are discussed of an extensive search for overwintering populations of soybean aphid in Indiana, Michigan, and Ohio.

Foliar Wheat Disease: Is There Fungus Among Us?
Begin scouting wheat for fungal leaf diseases, including powdery mildew, leaf and stem rust, and Stagnospora leaf blotch. Monitor weather conditions as plants approach flag-leaf emergence.

Staging Corn Plants and Implications Associated with Herbicide Applications
Don't forget when planning postemergence herbicide applications to corn that maximum size is extremely critical. Common methods for accurately determining plant heights and growth stages are reviewed.

How Shalt Thou Rotate?
Repeated use of herbicides that act in a similar manner within the target weed has resulted in the selection of weed biotypes that are resistant to these herbicides. Rotating herbicides based on site of action helps slow further development of herbicide-resistant weed populations.

Looking at Early Corn Development
Time to emergence in corn is reviewed. Where a corn crop was pounded by heavy rain after planting, rotary hoeing may help emergence.

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