Submitted to: Entomological Society of America Annual Meeting North Central Branch
Publication Type: Abstract Only
Publication Acceptance Date: 3/25/2001
Publication Date: N/A
Technical Abstract: Research concerning area-wide management of the corn rootworm complex (Diabrotica spp.) across the corn belt has renewed interest in the development of baits to target insecticidal control at the adults. As a result, an adjuvant bait containing cucurbitacin, Cidetrak CRW(R), has been developed in cooperation with Trece, Inc. (Salinas, CA). Benefits of this adjuvant include: reduced-rate applications of the insecticide, flexibility to select from commercially available insecticides, extended residual activity, and improved control of insecticide-resistant populations. Penncap M(R) (Elf Atochem, Philadelphia, PA) and Sevin(R) XLR Plus (Rhone-Poulenc, Research Triangle Park, NC) are two commercial insecticides that show good efficacy when used with Cidetrak. A series of laboratory experiments showed that treatments containing reduced rates of insecticide (1/10 the lowest label rate) with Cidetrak provided efficacious control of Western corn rootworm adults. Reduced rates of Sevin with Cidetrak had extended residual activity compared with similar treatments applied without Cidetrak when exposed to wash-off by rain and degradation by light energy. In general, organo-phosphate and carbamate insecticides tended to be more effective than pyrethroid- based insecticides when reduced rates were applied with the adjuvant. However, the feeding stimulant tends to improve the efficacy in situations that normally provide marginal control, e.g., when using less effective insecticides or when controlling insecticide resistant beetle populations.