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Pesticide Toxicology Laboratory

ISU Entomology / Pesticide Toxicology Laboratory / Laboratory assessment of flight activity displayed by Colorado potato beetles (Coleoptera: Chrysomelidae) fed on transgenic and cry3a toxin-treated potato foliage

Laboratory assessment of flight activity displayed by Colorado potato beetles (Coleoptera: Chrysomelidae) fed on transgenic and cry3a toxin-treated potato foliage

Authors: Alyokhin, A., Ferro, D.N., Hoy, C.W., Head, G.
Journal, Volume, Year: Journal of Economic Entomology, volume 92(1):115-120, 1999
Summary

Colorado potato beetles (Leptinotarsa decemlineata) were fed transgenic potato foliage, untreated Bt-free foliage, or Bt-free foliage treated with a foliar formulation of Bt (12.37 micrograms per micromililiter). Females were flown in flight mill studies and flight duration and number were recorded. Significantly fewer beetles flew after Bt exposure. Beetles from families that had already been shown to be highly predisposed to flight flew for a shorter duration after Bt exposure. The decreasing and shortening of flights might lead to more time spent by beetles within the field and greater selection pressure toward resistance.

Comments

Mostly important to resistance. Shows potential for chronic effects. Rare behavioral study.