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Regional Reports

May 17, 2002
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.

East-Central Illinois

As of May 13, the fields and soils of Piatt County are wet. The soils vary from very wet in the north to flooded, with water flowing over them, in the southern part of the county.

The amount of corn planted to date varies from about 33% planted in the southern third of the county (the area south of the Cerro Gordo Moraine) to nearly 100% planted by the time you reach the northern third of the county. That is quite a difference in a distance of less than 10 miles.

Corn emergence has been slow due to cold, wet soils. Hard-beating rains have produced a hard surface crust in some areas, which is adding to the difficulty for the corn to emerge. Replanting of fields will be an issue when the fields dry out due to severe ponding in some fields, particularly in the south.

Where the corn has emerged, it is a pale yellow-green color and is growing very slowly. A week of sunny weather with normal temperatures would really improve these fields.

Northern Illinois

During the past week, corn and soybean planting was the main activity in most areas, averaging about 80% or more corn planting completion. Soybean planting progress varies a great deal, with some areas in northwest Illinois being close to 50% completion and other areas averaging less than 20%.

Most of the state received rainfall on May 11 and 12, with counties bordering Wisconsin receiving 1 to 1.5 inches and other areas in northern Illinois receiving from 2 to 4 inches. Due to the cool, cloudy, wet weather conditions, emerged corn has a yellow appearance. Black cutworm moths continue to be caught in traps on a sporadic basis, but there were no intense captures reported last week.

Southern Illinois

Seven to 8 more inches of rain fell over the last week. There were several counties with absolutely no planting accomplished. Wheat is headed out and flowering, with increasing disease potential. Educators will provide delayed planting roundtables on May 23-24 at several different locations.

West-Central Illinois

Heavy rains, up to 6 inches in some areas, fell throughout the region during the last week. No fieldwork or planting has been done for sometime. Low areas are holding water and will for several more days.

Corn that has been planted and not affected by flooding conditions is in V2 to V3 stage. Population is acceptable and color is improving. There is concern about crazy top and other diseases in some of those fields.

Replanting will likely be necessary in many fields, especially in the ponded areas. Some producers are beginning to consider switching to earlier-
maturing hybrids but probably won't until June.

Flea beetle feeding has been observed in numerous cornfields. No other pests have been reported in corn. Extremely wet soil conditions, however, have not allowed proper crop scouting to occur.

Yellow nutsedge is beginning to appear in some cornfields.

Alfalfa weevil continues to be a major problem, with many fields above threshold levels. Many fields will be treated with an insecticide since extremely wet soils will not allow early harvest.

Wheat continues to deteriorate as wet weather persists. Many fields are now past GS8 and are beginning to head.



The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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