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Issue No. 20/August 26, 2011

Report from the Research Farms--Northern Illinois Agronomy Research Center
Comments on the current growing season are offered on the work of the University of Illinois research center in northern Illinois.

Severe Root Damage to Bt Corn Observed in Northwestern Illinois
Developments in damage by western corn rootworms in Iowa and northwestern Illinois underscore the importance of a long-term, integrated approach to corn rootworm management.

ISA-Sponsored Surveys of Illinois Soybean Fields Reveal No Brown Marmorated, Red Banded, or Red Shouldered Stink Bugs
Surveys of soybean fields in 47 Illinois counties indicated no incidences of several stink bug species and few western corn rootworm adults. Results for Japanese beetles and green cloverworms varied.

Preharvest Herbicide Applications in Corn and Soybean
There are limited options for preharvest herbicides in corn or soybean, but guidelines for available products are outlined.

Lessons from Late-Season Stress in Corn
The condition of the corn crop continues to deteriorate as soils have continued to dry out. Whether rain now will benefit corn relates most closely to the amount of green leaf area still left on the plants.