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Issue No. 22/September 1, 2006

Welcome to Fabián Fernandez
A new Extension specialist in soil fertility and nutrient management, Fabián Fernandez, has joined the University of Illinois Department of Crop Sciences.

Planning to Manage Western Bean Cutworm in Corn in 2007? Know Your Insects
Damage to corn ears caused by corn earworms, fall armyworms, and western bean cutworms is relatively similar, but the best management decisions will be guided by distinguishing between the insects.

Soybean Aphids Still Present in Soybean Fields, But the Threat Has Dissipated
The relative absence of multicolored Asian lady beetles in most areas and the low to moderate numbers of soybean aphids in most soybean fields means keeping close watch for 2007.

Behavior Bioassay Capable of Discriminating Between Variant and Nonvariant Western Corn Rootworm Populations
A newly published research paper describes the use of a behavior bioassay to separate variant and nonvariant western corn rootworms.

Down the Home Stretch
Corn is starting to reach black layer in many fields in southern and central Illinois. Rainfall over the past two weeks has been helpful to the soybean crop in most areas.

Nitrogen Rates for Corn in Illinois, Fall 2006
Fall nitrogen rate guidelines for corn are provided, calculated for different corn and nitrogen prices. Additional volunteers are needed for N-rate trials.

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