Issue No. 12, Article 10/June 10, 2005
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.
If it was dry last week, it is drier this week. Temperatures have found their way into the 90s. Crops have taken a defensive mode, with corn exhibiting significant leaf curling. Many fields also show lack of uniformity in height and color, primarily resulting from the recent growing conditions.
Wheat is rapidly approaching maturity. There are expected differences in varieties and some harvest may start as early as next week. Cool-season forages are also shifting to a dormant mode as a result of growing conditions.
There are no significant insect pests at this time to report. Ron Hines, Dixon Springs Ag Center, indicates trap catches on Japanese beetles, southwestern corn borer, and corm earworm. Visit his site, The Hines Report.
Dry soil conditions coupled with higher temperatures and moderate winds are beginning to cause some stress on area crops. Early-planted corn, for the most part, has adequate root growth to compensate for reduced topsoil moisture. Later-planted corn, however, in some locations (lighter soils, compacted areas, etc.) is beginning to show leaf roll during the afternoons.
Soybeans are behaving similarly. Most early-planted fields continue to grow and are adding trifoliate leaves. Soybean fields planted later and in soils worked early are simply not growing. They are more or less in a holding pattern, waiting for moisture to resume growth. Some beans will not emerge from dry soils until adequate rainfall occurs.
In many fields, there is no topsoil moisture in the top 3 to 4 inches. Pasture growth had been reduced and, in some cases, is not growing back. Corn rootworm larvae have been found in Menard County on first-year corn. There are reports of spider mites and leafhoppers in a soybean field edge in Logan County.
Some cornfields have been treated for weed escapes. Control may be marginal. Many cornfields had herbicides applied 6 to 8 weeks ago, with little rainfall to incorporate.