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 plants look better, but fields look worse. Corn growth has finally taken off, but the more healthy plants are leaving stressed neighbors behind, resulting in some very ragged-looking stands.
Insect activity: One early-planted field in McLean County had 25% ECB whorl feeding and moths still flying. Japanese beetles are emerging, and potato leafhopper infestations are heavy in many alfalfa fields.
Corn began to show heat stress last week, especially on the lighter soils. Some areas received rainfall on Tuesday, ranging from 0.3 to 2 inches, and scattered thunderstorms are expected on Wednesday. Corn plant populations are very uneven throughout the area. Some growers have been cultivating corn in fields that exhibit uneven plant height from the saturated soils in early June. In summary, the condition of the corn crop varies a great deal throughout the region. Postemergence herbicide application in soybeans began last week but some applications have been delayed due to heat stress. Late-planted soybeans are struggling and needed the recent rainfall.
No economic insect damage has been reported. However, potato leafhopper populations are increasing in alfalfa. Also, common stalk borer damage has been observed in corn border rows.
Recent rains have been sporadic and heavy in areas. Corn is in the V7-V9 stages, with some evidence of European and southwestern corn borer damage. Reports of grape colaspis damage continue. Wheat harvest is complete, with variable yields. Beans are progressing well.