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Issue No. 21/August 17, 2007

Alternative Uses for Herbicide-treated Soybean Fields
Dry soil conditions across areas of Illinois have been detrimental to soybean growth. Double-crop soybean appear to have been particularly adversely impacted, but in some areas even full-season plantings are demonstrating signs of significant stress. Soybean farmers in these drought-affected areas may be considering utilizing existing stands for something other than seed harvest.

Preliminary Root Evaluation Ratings for DeKalb, Monmouth, and Urbana Corn Rootworm Product Efficacy Trials
Producers are encouraged to be more vigilant in scouting efforts to evaluate Bt corn hybrid performance, and to not assume that Bt corn rootworm hybrids will always outperform soil insecticides in root protection.

Soybean Aphids Continue to Cause Concern, Although Most Soybeans Are in "Safe" Stage of Development
Where soybean aphid numbers are nearing economic thresholds on stage 5 or 6 soybeans, be aware that an insecticide applicaction is not likely to pay for itself in yield benefit.

Rotten Ears? Aspergillus and Others
The possible production of highly carcinogenic aflatoxins from Aspergillus infection warrants careful attention in corn that may be at risk.

Crop Prospects as the Season Winds Down
On average the Illinois corn crop will be good, but variability across the state will be higher than normal. Soybeans in dry areas of the state are suffering as much as corn, but rainfall in the next week could revive prospects to some extent.

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