Issue No. 16, Article 6/July 14, 2006
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.
Corn began tasselling last weekend. The scattered thunderstorms and moderate temperatures early this week are most welcome for the pollination process. Several reports have been received of insecticide treatments in soybeans for Japanese beetle infestations. Growers are reminded that the economic threshold for soybeans between bloom and pod fill is 20% defoliation. There is concern of potential silk clipping from Japanese beetles and rootworm beetles as corn is beginning to silk.
No reports have been received of insecticide treatment for soybean aphids. Extension educators monitoring western bean cutworm moth traps have reported first moth captures at several locations in the region.
Lyle Paul, area agronomist at the Northern Illinois Agronomy Research Center near DeKalb, reports the wheat variety trials averaged near 90 bushels per acre.
Wheat harvest is completed, with most producers more than satisfied with yields. Reports from most producers put the crop at the 70-plus bushel range.
Corn is beginning to leaf-roll in many areas due to dry soil conditions. Pollination began two weeks ago on early-planted fields. With a few exceptions, most fields have pollinated or are pollinating now. Silk clipping by several insects (western corn rootworm beetle, Japanese beetle, grape colaspis, caterpillar) has been noted. Some areas in the eastern side of the region have very heavy pressure, while areas to the west have thus far escaped with little injury. Little to no disease pressure has been reported.
Early-planted soybean is at R2 to R3 stages. Again, little disease pressure has been noted. Areas in the eastern part of the region are reporting Japanese beetle feeding.
Pasture forage growth has essentially ceased. While no one has been feeding hay yet, there is talk.