Issue No. 11, Article 8/June 8, 2007
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.
Many areas of the region received some rainfall on Friday, June 1, with most recorded amounts from 0.5 to 1 inch. There were also a few scattered reports of hail damage. Corn and soybeans have shown considerable growth in the last week due to welcome rainfall. Activities focused on side-dressing anhydrous ammonia in later planted corn and postemergence herbicide application on corn. Several reports have indicated that soil-applied preemergence herbicides on corn have not performed as expected due to the several weeks of dry weather after application. Several Extension educators reported receiving more complaints from rural residents about pesticide drift this year than in the past few years.
Jim Morrison, Extension crop systems educator, reported barley yellow dwarf virus in a Lee County wheat field. Bean leaf beetles are present in many soybean fields throughout the region, but there have been no reports of insecticide treatment.
Data are available from the University of Illinois 2007 forage variety trials at Freeport and Urbana (vt.cropsci.uiuc.edu/forage.html).
Wheat continues to develop and may be hard dough stage by the time this is read. The grain fill period has benefited from the absence of high temperatures. Many fields are approaching a golden color. There is maturity variability between main stems and late tillers.
Most corn is growing well, although there is a lack of uniformity in many fields.
Soybeans have established well. It has not been an easy planting season, but progress has been good for the calendar date.
Hay harvest continues, with fairly good harvesting conditions. Rainfall has been variable across the region, and some areas are notably dry.
Plan to attend Ewing Field Day, 9:00 a.m. on Thursday, June 14. The program focus will be wheat evaluation and management. Contact firstname.lastname@example.org for program details.
Rainfall has been spotty, although most locations have received adequate amounts. There are a few areas in the west-central part of the region where lack of rainfall has caused soybean stand deficiencies.
Wheat on soils with lower organic matter is beginning to lose color (signaling maturity), and soil cracks are very common in the west-central portions of the region. Wheat is close to hard dough stage. Armyworm is very common as well in this area, with numerous fields of wheat having been treated. Armyworm has been controlled in some pasture and hay fields as well. The combination effects of the weeks of ice during January and February, the April cold, armyworm damage, dry soils, and leaf diseases will prevent the wheat crop in the western portion of the region from reaching high yields.
European corn borer moths have been noted for over two weeks in the area. Pinhole feeding and "shotgun hole" feeding are evident in some areas, although not at economic levels. First- and second-instar larvae can be found.
Corn size ranges from V2 to V9; growth has been very rapid in the more mature corn, which makes it extremely brittle.
Hay yields are being reported as 60% to 70% of normal for first cutting, due to the loss from the April cold. Potato leafhoppers are being found. In a few isolated fields, various insects, such as armyworm and adult alfalfa weevils, have prevented harvested alfalfa from recovering.
Soybeans range anywhere from VC to V3. Some fields have had bean leaf beetle populations high enough for control to be required.