Regional Reports

June 16, 2000
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.

Northern Illinois

Last week we talked about the storms and moisture. This week it is essentially the same, other than the areas affected by large rainfall totals the past few days have increased.

Considerable flooding along all area rivers and streams with more heavy rain predicted at the end of the week.

Pythium and phytophthora are two water-mold diseases taking a toll on the soybean population.

Crazy top is a distinct possibility in cornfields where the entire plant was submersed and survived.

Some reports of Stewart's wilt trickling in.

Saturated soils and nitrogen in the nitrate form in the soil could lead to denitrification and leaching of nitrates, which could lead to some shortages of nitrogen available to the plant in the future.

Post-herbicide applications to soybeans and corn are falling behind schedule, and weeds are growing with the ample moisture.

Leafhopper numbers are holding steady in fields swept late last week in Stephenson County, with treatment thresholds not yet reached.

Fireflies are supposed to be the indicator of when the rootworm hatch is under way. As of this writing, I have not seen one firefly!

Southern Illinois

Wheat: Some fields have been combined, but the bulk of the grain harvest will begin sometime in the next 7 to 10 days, depending on rain.

Corn: Lots of variation in growth stage. Earlier-planted corn looking good. Some of the later-planted corn has shown retarded growth. Relatively cool nights over the last couple of weeks coupled with insect damage have slowed these fields. Quite a number of insects are affecting some fields. Thrips damage has set back quite a few of the later-planted corn across the region. Grape colaspis has been found in a number of poor-looking fields.

Beans: Seem to be progressing well.

Other: The grasshopper hatch has been very high. Most feeding has been confined to noncrop areas, but the potential for some significant feeding in beans and corn exists.

West-Central Illinois

· Rain fell in most of the region during the week with reports of up to 5 inches in some areas. Only minor crop losses occurred as a result.

· With the abundant moisture and warm temperatures, crops are growing rapidly. Some cornfields are in V9 stage and beyond, and some soybean fields are in V3 to V5 stages.

· Weed-control efforts are confined to postemergence application on soybean. Most herbicide applications on corn are completed.

· Soybean seedling diseases such as Rhizoctonia, Fusarium, and Pythium can be found in many fields. However, there have been no reports of replanting because of those diseases.

· Soil compaction, especially on lighter-colored soils, is somewhat common this year in some cornfields. Dry-weather stress may result earlier in the growing season due to the predominant horizontal root growth.

· Wheat is maturing rapidly with harvest beginning very soon in the southern part of the region. Harvest usually does not begin until the last week of June.

· Potato leafhoppers are abundant in alfalfa fields.