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Issue No. 21/August 18, 2006

Preliminary Root Ratings from Corn Rootworm Control Trials--DeKalb, Monmouth, and Urbana
Details are provided on preliminary results from the continuing corn rootworm control trials in three locations. In general, granular soil insecticides did not perform as consistently this year.

Soybean Aphid Densities Have Increased Noticeably in Some Fields in Illinois
Producers are strongly encouraged to sample fields in several areas every two to three days if average numbers of soybean aphids are still below the economic threshold.

Insect Quick Notes
Keep watching for western bean cutworms in corn and bean leaf beetles and green stink bugs in soybean.

Charcoal Rot in Soybeans
Symptoms and management suggestions are outlined for charcoal rot, which has been found in fields across central Illinois.

Corn Marches On, Crunch Time for Soybean
It appears that 2006 will be a very good year for Illinois corn. There are also reasons to be optimistic about soybean, but fingers will have to stay crossed a bit longer.

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