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 main activities the past week include finishing up soybean planting, sidedressing anhydrous ammonia, corn postemergence herbicide application, and baling hay. Cool temperatures throughout the region continue to delay crop development. Few insect infestations have been reported.
Several reports have been received from rural homeowners concerning suspected herbicide drift on ornamentals. Further investigation suggests some herbicide-drift injury did occur. However, several instances of ornamental foliar disease and winter injury have also been confirmed.
Planting is winding down. Local estimates put corn and soybean planting progress at 99% and 95% complete, respectively. There has been some replanting of corn acres in wet areas, but the extent of replanting pales in comparison to last year. Corn development is beginning to progress at a more rapid pace, with earliest-planted corn near the V8 growth stage. Soybean stands look excellent in most cases, with most fields in the cotyledon to unifoliate stage. Soybeans planted in late April and early May are in the first-trifoliate stage.
Cutting of corn plants by black cutworm has been reported in some fields, with about half those fields receiving treatment. However, the degree of the problem has not been as severe as was anticipated. Some reports of grape colaspis feeding on corn have been received, but very few fields are exhibiting symptoms indicating severe damage. Evidence of feeding of wireworms can still be found in many corn fields throughout the region, and herbicide injury in corn has been more widespread than usual, most likely a result of the cooler-than-normal weather that has been prevalent for the past few weeks.