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Issue No. 12/June 12, 2009

EPA Revokes All Tolerances for Carbofuran--Labeled Uses May Continue Throughout 2009
This article shall serve as an addendum to the one published in the Bulletin on June 10, 2009 regarding carbofuran. Although the revocation of tolerances for carbofuran will be effective on August 13, 2009, distributors and retailers may continue to sell carbofuran and farmers may use this insecticide according to label instructions until December 31, 2009.

Corn Rootworm Larval Hatch Reported
Over the next 2 to 3 weeks, corn rootworms will continue to hatch, subjecting corn root systems to larval injury.

Black Cutworm Damage Observed in Northern Illinois
Don't neglect to scout for black cutworm while focusing on soybean planting--it could prove a costly mistake.

European Corn Borer Moths and Larvae Active
Despite low anticipated densities of European corn borers this season, refuges of non-Bt corn could be vulnerable to significant infestations late in the growing season.

Soybean Aphids Found in Michigan Soybean Fields
Research at the University of Guelph showed the significance of two important natural predators of soybean aphids: the sevenspotted lady beetle and the multicolored Asian lady beetle.

EPA Revokes All Tolerances for Carbofuran
The USEPA has revoked all tolerances for carbofuran, most commonly used in the Corn Belt as Furadan 4F.

Maximum Corn Growth Stages for Postemergence Herbicides
Because adverse environmental conditions can result in corn plants that are older than their height would suggest, be sure to accurately assess plant developmental stage when choosing a postemergence corn herbicide.

Soybean Planting Progress Update
Rising soybean seed costs make it more important than ever to monitor soybean emergence rates and stand establishment.

How Much Nitrogen Do I Need?
The complexities of deciding whether to apply more nitrogen to corn fields, and how much, are discussed.

Factors That Limit Nutrient Availability
Even under adequate nutrient management practices, deficiencies of phosphorus and potassium can occur, usually temporarily and during early stages of development.

Taking Stock of the 2009 Corn Crop
The status of the season's corn crop is detailed, including late planting, replanting, death of seeds and seedlings, and damage from birds and rodents.

Wheat as Harvest Approaches
After a good winter and early spring, Illinois wheat crop prospects have taken a considerable nosedive due to wet weather in recent weeks.

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