MECHANISMS CONFERRING RESISTANCE OF WESTERN FLOWER THRIPS TO BENDIOCARB

Mechanisms associated with bendiocarb resistance were examined in two strains of western flower thrips, Frankliniella occidentalis (Pergande ), that differed in their susceptibility to this carbamate by 13.6-fol d. No appreciable differences between the two strains in [C-14]bendioc arb penetration and excretion were detected; however, bendiocarb was m etabolised substantially faster by the resistant KCM thrips than by th e more susceptible UMC thrips. No appreciable difference between the t wo strains was found in the sensitivity of acetylcholinesterase activi ty to inhibition by bendiocarb. It was concluded that bendiocarb resis tance in KCM western flower thrips was due to enhanced metabolism that probably was mainly oxidative in nature.