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.
The major activities the past week, where fields were dry enough, included sidedressing corn with nitrogen, postemergence herbicide application, replanting soybeans due to field ponding, and finishing first cutting of alfalfa. Corn populations throughout the area are quite variable.
Jim Morrison, crop systems Extension educator, reports armyworm damage in corn no-tilled into alfalfa. Bean leaf beetles are feeding in soybeans, but there have been no reports of economic damage.
Wheat is starting to turn, and oats are approaching the boot stage.
After a dry weekend, substantial rain fell again on Tuesday, soaking most of the region. Newly constructed waterways, dry dams, and terraces will undoubtedly require some well- deserved attention this fall. Most planting is complete, with the exception of a few soybean fields and some late replanting of corn. The bulk of the fieldwork this past week has been sidedressing of nitrogen on corn, mowing roadsides, and putting hay in the barn. Early-planted corn has progressed well and is anywhere from the V5 to V8 growth stage. Newly planted soybeans are emerging very rapidly and will likely catch up with earlier-planted soybeans. Wireworm feeding has begun to become less of a problem, while the focus switches to corn borer and bean leaf beetle.
Most emerged soybeans are approaching the first trifoliate, which means that it will not be long before a postemergence application of herbicide will be required in fields where a preemergence herbicide was not used. Keep in mind that, while delaying application of a nonresidual such as glyphosate may reduce the need for retreatment, a substantial reduction in yield may result if early-emerging weeds are allowed to compete with the soybean crop beyond the second or third trifoliate stage.