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Issue No. 5/April 28, 2006

A correction is noted to Table 5 in the April 21, 2006, issue of the Bulletin.

Black Cutworm Flights Diminish in Southern Illinois: Careful Scouting Still Warranted
Later planting means that weed-infested fields will be prime egg-laying targets for female black cutworm moths. Careful scouting is very important as corn plants begin to spike through the soil.

Heavy Infestations of Cowpea and Pea Aphids in Alfalfa Continue
Impressive densities of cowpea and pea aphids are being reported in some areas of Illinois.

Scouting and Use of Thresholds for the Variant Western Corn Rootworm: An Overlooked and Ignored Management Approach?
Have we forgotten the importance of the "I" in IPM? Challenges and obstacles exist to the implementation of scouting and use of economic thresholds for corn rootworms.

Liquid Carriers for Herbicides After Corn Emergence
Adding a postemergence herbicide to a liquid nitrogen solution carrier can greatly increase corn injury.

Control of Volunteer Corn
Options for controlling volunteer corn in soybean and corn are outlined.

Windy Conditions and Herbicide Applications
Soil conditions may be favorable for corn planting, but remember to take wind speed into account when making herbicide applications.

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