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No. 22/September 07, 2001

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Lock in the Dates for the 2002 Crop Protection Technology Conference and the Corn and Soybean Classics
The dates for the Crop Protection Technology Conference are January 8 and 9, 2002, and it will be held at the Illini Union on the campus of the University of Illinois. Similar to last year's meeting, participants will be able to "tailor make" their individual schedules for the 2-day conference.

Plan to attend the regional Corn and Soybean Classic meetings scheduled for January 2002. Meeting dates and locations are provided here.

European Corn Borer Fall Survey Under Way
As the 2001 growing season winds down, the severity of European corn borer injury across the state remains somewhat unclear. To more accurately assess the level of crop injury and densities of the overwintering population of borers, the 2001 survey was initiated in early September. We will offer our statewide population and injury reports in an upcoming issue.

The article describes how the survey is performed.

Corn Pith Weevil
As growers survey their corn crop this fall, they wonder why there is so much tip breakage. This type of damage is usually a good indication that corn borers have been active, but diseases like anthracnose can cause tip dieback. Severe weather patterns and high winds can also cause localized damage. Another cause is the corn pith weevil.

What More Will We Know About Soybean Aphids by the End of the Year?
The soybean aphid has been a rather elusive pest in Illinois in 2001. By the end of the season, we will have a lot of sampling data to sort through. As we interpret results from our efforts and the efforts of fellow entomologists in other states, we will make them available to you.

Planting Wheat? Remember the Hessian Fly
Although the recommendation of planting wheat after the (Hessian) fly-free date seems repetitive, it is a time-proven tactic for reducing the potential for infestations by this historically threatening pest. Planting wheat after the fly-free date in a given county also reduces the likelihood of the occurrence of Septoria leaf spot. Wheat planted after the fly-free date also is less susceptible to the barley yellow dwarf and wheat streak mosaic viruses vectored by aphids and mites, respectively. Finally, wheat planted on or after the fly-free date probably will suffer less from soilborne mosaic virus.

Wheat Seed Treatments for Fall 2001
Many variables come into play when deciding whether or not seed treatments pay off. Because many of these variables are difficult to predict with much accuracy before planting, most folks looking for "cheap insurance" either plant a little heavier or use an inexpensive seed treatment. Just like car insurance, you buy the coverage you need based on product performance, your particular situation, and desired comfort level.

This article describes options for seed treatment.

Identifying the Enemy
Accurate identification of Amaranthus (pigweed) species can be very difficult, especially during early vegetative development because many of these species look very similar. This article focuses on six species: redroot pigweed, smooth pigweed, Powell amaranth, Palmer amaranth, and common and tall waterhemp.

Pollination Problems in Corn
Without question, poor kernel set in corn is a problem in Illinois. Although it has been seen in most areas and on more than one hybrid, certain genetics and certain areas have experienced more of the problem. This article addresses the following questions:

Did weather during pollination cause this problem?
What did cause it if not the weather?
Was there a genetic problem with pollen supply?
Did herbicides cause some of this?
What hybrids were most affected?
What do we do now?

The article also discusses the condition of soybean crops.

Regional Reports
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.

This week's issue includes reports from northern and southern Illinois.

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

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