Cypermethrin, tetramethrin, permethrin, deltamethrin, chlorpyrifos, fenitrothion, pirimiphos-methyl, propoxur, fipronil and imidacloprid were tested to the susceptible insect colonies in our laboratory for the determination of the insecticides resistance discriminating dose or diagnostic dose. The results would help the pest control operators to apply more effective control agents. Laboratory of biological assays showed that the susceptibility measurement results of Aedes albopictus in Taiwan to ten types of pesticides show low drug resistance to Cypermethrin, Tetramethrin, Permethrin, Deltamethrin, Chlorpyrifos, Fenitrothion, Pirimiphos-Methyl, Propoxur, Fipronil and Imidacloprid. The susceptibility measurement results of Aedes aegypti in Taiwan to ten types of pesticides show medium drug resistance to Imidacloprid; medium-high drug resistance to Cypermethrin and Permethrin; and high drug resistance to Deltamethrin, Pirimiphos-Methyl, and Fipronil. Susceptibility measurement results of Culex quinquefasciatus in Taiwan to ten types of pesticides show low drug resistance to Cypermethrin, Tetramethrin, Permethrin, Deltamethrin, Chlorpyrifos, Fenitrothion, Pirimiphos-Methyl, Propoxur, Fipronil, and Imidacloprid. Susceptibility measurement results of Armigeres subalbatus in Taiwan to ten types of pesticides show low drug resistance to Cypermethrin, Tetramethrin, Permethrin, Deltamethrin, Chlorpyrifos, Fenitrothion, Pirimiphos-Methyl, Propoxur, Fipronil, and Imidacloprid. Susceptibility measurement results of Blattella germanica to ten types of pesticides show only strain E in the north shows medium drug resistance to Permethrin, Deltamethrin, and Fenitrothion. Susceptibility measurement results of the Periplaneta americana in Taiwan to ten types of pesticides show low drug resistance. Susceptibility measurement results of common Musca domestica in Taiwan to ten types of pesticides show low drug resistance to Fipronil, low-medium drug resistance to Chlorpyrifos, medium drug resistance to Fenitrothion and Imidacloprid, medium-high drug resistance to Tetramethrin, Permethrin and Propoxur, high drug resistance to Pirimiphos-Methyl, medium-severe drug resistance to Cypermethrin, and severe drug resistance to Deltamethrin. Susceptibility measurement results of Chrysomyia megacephala in Taiwan to ten types of pesticides show low drug resistance to Cypermethrin, Tetramethrin, Permethrin, Deltamethrin, Chlorpyrifos, Fenitrothion, Pirimiphos-Methyl, Propoxur, Fipronil, and Imidacloprid. Susceptibility measurement results of Drosophila melanogaster in Taiwan to ten types of pesticides show low drug resistance to Cypermethrin, Tetramethrin, Deltamethrin, Chlorpyrifos, Fenitrothion, Pirimiphos-Methyl, and Fipronil, low-medium drug resistance to Permethrin and Imidacloprid, and medium drug resistance to Propoxur. Susceptibility measurement results of Telmatoscopus albipunctatus in Taiwan to ten types of pesticides show low-medium drug resistance to Cypermethrin and Fipronil. Susceptibility measurement results of Cimex lectularius in Taiwan show low drug resistance to Cypermethrin, Tetramethrin, Permethrin, Deltamethrin, Chlorpyrifos, Fenitrothion, Pirimiphos-Methyl, Propoxur, Fipronil, and Imidacloprid. These results provide the scientific basis for integrated pest management systems in effective insecticides used.

environmental pests, resistant, discriminating dose or diagnostic dose, bioassay