Issue No. 10, Article 10/June 1, 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 precipitation over the weekend of May 26, with amounts ranging from 0.7 to 1 inch. Rainfall was needed for emerged crops and especially for soybean seed lying in dry soil and a few producers waiting for rainfall before finishing planting soybeans.
Corn emergence was generally uniform a few weeks ago, but some reduced population stands have now appeared. Reports from the field indicate that some decreased populations are due to seedling disease, black cutworms, white grubs, and environmental stress. There does not seem to be a common cause.
Dave Feltes, IPM extension educator, reports economic damage from black cutworm larvae in a corn field in Rock Island County. Ellen Phillips reports some economic damage from alfalfa weevils in a McHenry County alfalfa field.
Wheat continues to develop and is now in the dough stage. Many fields are pale green, already approaching the yellow color of maturity.
Corn growth stages vary, but quite a bit of acreage is transitioning from seminal to nodal roots. Some fields look good, but there are also spotty fields that lack uniformity.
Good weather has permitted soybean planting to progress rapidly. Most fields are VE to V4. Bean leaf beetle feeding has been rather intense at select locations.
Hay harvest continues, with fairly good harvest conditions. Rainfall has been variable across the region.
Mark your calendar and plan to attend Ewing Field Day at 9:00 a.m. on June 14, 2007. Contact firstname.lastname@example.org for program details.
The first cutting of alfalfa continues in the area, with weekend moisture dampening progress in some areas.
Black cutworm problems linger in scattered areas throughout the region. Cool temperatures have stagnated crop development in some areas and thus extended the window of opportunity for this pest. Most problematic have been fields that previously experienced some winter annual pressure and those in no-till/strip till.
Other insect news includes observations of European corn borer moths, which should be laying eggs in our area; occasional observations of grape colaspis in both corn and beans; and economically significant levels of armyworm in some locations.
Sangamon, Menard, and Mason counties report the appearance of "floppy corn," or what has previously been termed "rootless corn syndrome." Nodal roots have not developed well, leaving only a tenuous mesocotyl connection between the aboveground portion of the plant and seed. Recent rains have hopefully remedied this situation, allowing nodal roots to develop and plants to stabilize.
Producers are working on postemergence weed management programs.
Soybeans are up and doing well, with many educators now establishing their sentinel plots for Asian soybean rust.