Issue No. 13, Article 9/June 22, 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.
Thunderstorms went through the region on Monday afternoon and evening, June 18. Recorded precipitation was quite variable, with the following amounts reported by Extension educators: Ogle County, 0.2 to 2.2 inches; Lee County, Dixon area, 0.7 inch; Bureau County, Walnut area, 0.8 to 1.2 inches; Grundy County--north of Morris, up to 1.7 inches, south of Morris, 0.2 to 0.3 inch; Kendall County--Yorkville, 0.5 inch, Plattville, 1.8 inches; Winnebago, 1.7 inches; Whiteside County, Morrison, 0.3 inch. The crops have responded very well to the rainfall and moderate temperatures.
Growers are reminded to promptly monitor non-Bt corn fields throughout the region for potential European corn borer infestations. Soybean aphids are being found in soybean fields but at very low levels. The moderate temperatures and rainfall can contribute to increased soybean aphid population buildup in the near future. Extension educators began this week to monitor for Western bean cutworm moth flights and will conduct some follow-up field scouting at the trap locations.
It is hot and dry!
Wheat harvest is almost done. Yields have been variable but better than expected, often in the 45- to 60-bushel range.
Most corn fields are in the defensive mode. It is easy to identify the fields that were planted too wet or compacted.
Soybeans are still growing fairly well, and early plantings will soon be in the reproductive stage.
Japanese beetles and small grasshoppers are becoming numerous.
West Central Illinois
Producers continue to watch the skies for rain as crops are showing signs of drought stress.
Soybeans are now at V4-V5 in the earliest-planted fields. Reports of scattered soybean aphids have been made, and Rhizoctonia root rot is showing up in fields in Menard, Montgomery, and Sangamon counties.
Corn is near tasseling in early-planted fields across the area. Western corn rootworm larvae can be found feeding on corn roots. They range in size from first to third instar larvae. Drought stress is apparent in corn fields as some leaves begin to roll up midmorning during the heat. Reports suggest that Japanese beetles are emerging in the area.
Wheat harvest started around June 14 in the southern part of the region. Test weights ranging in the mid- to upper 50s, small kernels, and low moisture seem to be common. Double-crop soybeans are being planted with the forecast of rain early this week. If moisture does not come soon, producers may wait until after a rain to finish planting.
Hay harvest is mostly complete. Producers were busy cutting and baling forages in unusual places, including grassed waterways and open lots. Most producers reported having only two-thirds of their normal harvest.