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Summary
of Illinois Western Corn Rootworm
Monitoring Program 1999
University of Illinois Extension, Department of Crop Sciences
Compiled by: Susan T. Ratcliffe, Michael E. Gray, and Kevin L. Steffey
Country
Trap Capture Averages
Field
Trap Averages Broken Out By County
Table
of All Field Trap Averages
This
Summary contains trap capture averages for 269 sites from 26 counties
in Illinois. This summary provides general information regarding
the presence or absence of western corn rootworms in soybean fields
in sampled counties. Trap capture averages vary greatly from field
to field within a county, and the use of a soil insecticide must
be made on a field-by-field basis. We continue to encourage the
use of 12 Pherocon AM traps per field over a four-week period, as
described in the Western
Corn Rootworm Insect Information sheet, to determine if a soil
insecticide application is necessary. The four-trap method described
in the publication should be used only to determine the presence
or absence of western corn rootworms.
On
behalf of the University of Illinois Extension, we thank all the
individuals who participated in this program and we look forward
to continued cooperation to improve management of the western corn
rootworn in Illinois. In 1999, many of the individuals who reported
scouting data in 1998 participated in our 1999 Root Rating Program.
As a result of this participation, Extension Specialists have refined
the economic threshold. If you scouted in 1999, please consider
participating in the 2000 Root Rating Program to assist us in determining
if further refinement in the economic threshold is warranted. In
addition, as a result of funding from a Conservation 2000 grant
(Illinois Department of Agriculture), a limited number of free sticky
traps will be available to individuals interested in scouting soybean
fields in 2000. For more information on the 2000 Root Rating and
Western Corn Rootworm Monitoring programs, contact Susan T. Ratcliffe
by email (sratclif@uiuc.edu)
or phone (217) 333-9656.
The
Western
Corn Rootworm Insect Information sheet is available on the internet,
or a copy may be obtained by contacting University of Illinois Extension,
Department of Crop Sciences, 1102 S. Goodwin Avenue, Urbana, IL
61801, (217) 333-6651, or via email (ipm@uiuc.edu)
Producers
may also report
their scouting results directly to the University of Illinois
Extension via the Internet.
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