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Historical European Corn Borer Data Available on the Web

December 6, 2002
We have published the results of our annual fall survey of second-generation European corn borers for many years in the Bulletin and in the past in the proceedings of the Crop Protection Technology Conference (formerly the Illinois Agricultural Pesticides Conference, formerly the Custom Spray Operators Training School Manual). We also have shared information from these fall surveys with people at numerous conferences, workshops, and regional and local meetings. Now, after a couple of years of hard work, you can see data from these annual fall surveys for yourself on the Web. I am extremely pleased to direct you to this information, and I hope you find it both educational and useful.

Getting the data from fall surveys of second-generation European corn borers in Illinois from 1943 through 2001 was a massive undertaking. The people involved in this process are too numerous to mention. However, I want to thank some of the key players who have helped bring our ideas into being. Charles Guse, currently a Ph.D. candidate in the Department of Natural Resources and Environmental Sciences, was responsible for overseeing the creation of the electronic database many years ago. Susan Ratcliffe, currently the North Central Regional IPM Facilitator, began working with personnel in Information Technology and Communication Services (ITCS, College of ACES, UIUC) a couple of years ago to begin development of a Web site for our fall survey database. Finally, David Stigberg with ITCS, with help from some programmers, brought everything to fruition. And all of this was made possible by a grant (Illinois IPM On-Line) from the Illinois Council on Food and Agricultural Research (C-FAR).

For an overview and an explanation for the fall surveys of second-generation European corn borers in Illinois, go to european_corn_borer/fall_survey.html. From this site, you can link to (, also developed with funding from a C-FAR grant), which includes the European corn borer database from 1943 through 2001. The data from the 2002 fall survey of second-generation European corn borers will be added soon.

When you get to the Web site, click on "European Corn Borer, 1943-2002" in the left panel. When the new Web page loads, you should see an outline map of Illinois that includes all counties and crop reporting districts (as created by the Illinois Agricultural Statistics Service). At the site you will be able to view data collected from individual counties, for crop reporting districts, or for the state. For individual counties or specific crop reporting districts, you can select the county or district of interest from the menus provided, or you can click on the county or district in the outline map. If you do the latter, the county or district of interest will be indicated in yellow. You also can view data for all years or for selected years (e.g., 1950-1975, 1990-2000). In the lower portion of the panel, you can access specific information for a given year for either individual counties (default) or crop reporting districts. The information is presented in both graph and colored map formats. The manner in which the data are presented (class options--natural break, quantile, equal interval, standard deviation) can be changed, and the options are explained when you click on "Class Options," then "Help." For a brief explanation about how to use and navigate the Web pages, click on "Help" in the upper right of the panel titled "European Corn Borers."

We sincerely hope you find the historical information about European corn borer densities in Illinois useful. We suspect that the data can be used in many ways, including determination of economic impact of corn borers and planning for use of Bt corn for management of European corn borers. Please feel free to use the data in any manner you deem appropriate. If you develop slides or hand-out sheets from the Web site, please attribute the source of the information--University of Illinois, Extension Entomology, Department of Crop Sciences and Illinois Natural History Survey. Also, as always, please don't hesitate to contact us if you have questions or if you desire more information.--Kevin Steffey

Author: Kevin Steffey

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

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