Insecticide susceptibility of the small brown planthopper selected with buprofezin and etofenprox

Abstract

The changes in insecticide susceptibility of the small brown planthopper (SBPH) selected with etofenprox and buprofezin were studied.
The LD ₅₀ value to etofenprox of SBPH selected with etofenprox was 6.7 times as large as that of the parent colony. The LD ₅₀values to organophosphates and carbamates of the etofenprox-selected colony did not differ from those of the parent colony.
The LC ₅₀ value to buprofezin of the buprofezin-selected colony was approximately the same as that of the parent colony. The LD ₅₀ values to organophosphates, carbamates and synthetic pyrethroids of the buprofezin-selected colony were almost the same as those of the parent colony.
Aliesterase activities of SBPH did not increase by etofenprox or buprofezin selection.