Genetic analysis and effect of synergists on diazinon resistance in the bulb mite, rhizoglyphus rohini claparède (acari:Acaridae)

Abstract

A genetic analysis revealed that the resistance to diazinon of the bulb mite, Rhizoglyphus robini Claparède. lacked sex linkage, and was based on the operation of a dominant allele. Synergism of diazinon by eight inhibitors of detoxifying enzymes in susceptible and resistant strains of the bulb mite was determined. Esterases were shown to play an important role in detoxification against diazinon. S.S.S‐tributyl phosphorotrithioate, an esterase inhibitor, was the only synergist which obviously synergized diazinon. The others, including the inhibitors of glutathione‐S‐transferases, carboxylesterase and mixed function oxidases, showed obscure or even antagonistic effect.