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Pesticide Toxicology Laboratory

ISU Entomology / Pesticide Toxicology Laboratory / Stage-specific mortality of Colorado potato beetle (Coleoptera: Chrysomelidae) feeding on transgenic potatoes

Stage-specific mortality of Colorado potato beetle (Coleoptera: Chrysomelidae) feeding on transgenic potatoes

Authors: Wierenga, J.M., Norris, D.L., Whalon, M.E.
Journal, Volume, Year: Journal of Economic Entomology, volume 89(5):1047-1052, 1996
Summary

Resistant (to insecticide) and susceptible strains of CPB were fed Cry3A transgenic foliage and artificial diet with purified toxin added. For all strains, the 1st instar were sensitive, but the 2nd instar resistant strains had significantly higher survival. Susceptible larvae typically lost weight. Adult mortality was 25% in resistant strains and 100% in susceptible strains.

Comments

Potential for resistance development in strains that are already resistant to insecticides.