Issue No. 21, Article 7/August 13, 2004
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.
Widespread precipitation occurred on the evening of August 3, with the majority of the region receiving from 1.0 to 2.0 inches; however, some areas reported more than 3.0 inches. The current week has been unseasonably cool and cloudy.
Concerning soybean pests, there have been a few reports of soybean fields treated for Japanese beetles. Also, a few fields have been confirmed with infestations of Sclerotinia stem rot (white mold), which is not surprising considering the cool, moist weather, including the heavy morning dews the region has experienced for some time.
Oat grain and hay harvest have been occurring the past week.
Most areas received .3 to 1.5 inches of rainfall last week, and it was certainly welcome. Corn kernels at ear tips are aborting on soils low in moisture. Cool temperatures are certainly making for less stress on these soils, but we need moisture to continue to fill. Most corn is dented. Livestock producers indicate that corn silage could begin next week.
Sudden death syndrome is appearing in more soybean fields. The disease first appeared a month ago in April-planted fields; now it is appearing in some fields planted in mid-May. For the most part, the earlier-infested fields have only small areas affected.
There are some fields in which the disease is confined to the lower canopy, making windshield scouting difficult. Still very few aphids are to be found. Many beans are at R5 maturity or greater. Western corn rootworm beetles can be found in soybean fields throughout the area. Based on yellow sticky trap monitoring, far fewer numbers are being reported in the western counties compared to those counties in the eastern part of the region.
A few late escaping weeds can be found in some soybean fields.
Potato leafhoppers are still plentiful in some alfalfa fields. A few producers are close to harvesting their fourth cutting.