Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: February 4, 2005
Publication Date: March 20, 2005
Citation: French, B.W., Chandler, L.D., Janus, A.T., Hartman, D.A., Beck, D.A. 2005. Suppression of adult corn rootworm populations in the South Dakota areawide management site using semiochemical-baits. North Central Branch Entomological Society of America Web Site, http://esa.ent.iastate.edu/2005_west_lafayette/program, March 20-23, 2005. Technical Abstract: The corn rootworm areawide management program was conducted from 1997 – 2001 in five states. One site in Brookings County, SD was organized into an areawide unit encompassing 41.4 km2 (16 mi2). This area contained both northern, Diabrotica barberi Smith and Lawrence, and western corn rootworms, D. v. virgifera LeConte. Semiochemical baited insecticides were used to suppress adult populations. Individual fields were aerially sprayed with the baited insecticides when the number of corn rootworms captured in yellow sticky traps reached a set threshold. For analysis, fields were broken down into “Spray Weeks” comprised of fields sprayed during the same week. This approach allowed us to isolate those fields sprayed during the same week so that an estimate of the effectiveness of semiochemical-baits to suppress adult populations could be determined. This analysis showed that populations of corn rootworms decreased between 30% and 76% the first week after being sprayed and after the second week populations decreased between 79% and 88%. Understanding the effectiveness and trends of these treatments is important to pest managers so that timely applications are made to effectively control adult populations of corn rootworms.