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.
Soil conditions are still dry despite some rain. When a half-inch of rain only slowed down planting of the Macon County soybean plot for a couple of hours, it is dry.
There are scattered incidents of insect problems in corn. Wireworms and annual and true white grubs have caused varying amounts of damage across the region.
There are some good- to excellent-looking wheat fields and a lot of poor-looking wheat fields. Most current wheat problems are related to viral infections.
Alfalfa weevil larvae are causing severe tip damage to alfalfa that is still not ready for first cutting.
Corn planting is virtually complete.
Considerable progress was made in bean planting the past week.
Welcome rains occurred May 8 and 9.
Later-planted corn is emerging in 4 or 5 days due to above-normal temperatures that have been occurring.
Alfalfa fields involved in the PEAQ (Predicative Equation of Alfalfa Quality) project as of May 8 averaged 25 inches in height and had a RFV (relative feed value) of 181. The web site address for this project is http://peaq.outreach.uiuc.edu.
Alfalfa weevil infestations across northern Illinois are widespread with levels of infestations being a real mixed bag. Some fields have been treated, some producers have elected to cut early instead of treating, and, in far northern Illinois, fields checked were still below treatment thresholds.
Growing degree-day accumulations from mid-April intense captures of black cutworm moths are rapidly approaching 300. If temperatures remain warm, initial cutting activity by young cutworm larvae could be noticed as early as the weekend of May 14.
· Significant rainfall fell on most of the area, with reports of up to 2 inches or more.
· Most fields have an excellent stand of corn, but some replanting has been done because of white grubs and wireworms. Several fields have been treated for flea beetle, southern corn leaf beetles, and black cutworm, with one report from western Illinois of 2% to 6% cut plants.
· Some rotary hoe damage occurred in some cornfields in Logan County.
· Some producers are concerned about weed control because of little or no precipitation after preemergence herbicide application. Some weeds are emerging through single-pass programs.
· Acetamide injury from Guardsman can be found in some fields around Springfield. Symptoms were "buggy whipping" and leaves failing to unfurl. Symptoms were most severe in overlapped areas. Some replanting may be necessary.
· Many producers are finished with soybean planting. First-generation bean leaf beetle population is high in some fields, but there have been no reports of insecticide application.
· Alfalfa harvest continues, and many fields are being treated for alfalfa weevil after first cutting is
· Most wheat is headed (growth stage Feekes 10.1) and looking good.