Issue No. 19, Article 7/August 1, 2008
Extension center educators, unit educators, and unit assistants in northern, west-central, east-central, and southern Illinois prepare regional reports to provide more localized insight into pest situations and crop conditions in Illinois. The reports will keep you up to date on situations in field and forage crops as they develop throughout the season. The regions have been defined broadly to include the agricultural statistics districts as designated by the Illinois Agricultural Statistics Service, with slight modifications:
- North (Northwest and Northeast districts, plus Stark and Marshall counties)
- West-central (West and West Southwest districts, and Peoria, Woodford, Tazewell, Mason, Menard, and Logan counties from the Central district)
- East-central (East and East Southeast districts [except Marion, Clay, Richland, and Lawrence counties], McLean, DeWitt, and Macon counties from the Central district)
- South (Southwest and Southeast districts, and Marion, Clay, Richland, and Lawrence counties from the East Southeast district)
We hope these reports will provide additional benefits for staying current as the season progresses.
Environmental conditions for corn pollination have been mostly moderate temperatures and adequate soil moisture. Most winter wheat has been harvested, with reported yields ranging from 75 to 100 bushels per acre.
Extension educators monitoring western bean cutworm traps in northwest Illinois continue to report high numbers of moth captures. This is the third year of the monitoring project, and numerous trap locations have reported total season captures of 100 to 300 moths since late June, compared with previous years' typical totals of 10 moths or fewer from late June to mid-August.
Japanese beetle populations have been highest in the central and southwest portion of the region, but to date there have been no reports of widespread silk clipping. Some Japanese beetle-infested soybean fields have been treated with an insecticide, while some corn fields have been treated as a preventative measure.
Western corn rootworm beetles and soybean aphids continue to range from nearly absent to present in low numbers in fields throughout the region.