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.