| Summary: | 碩士 === 朝陽科技大學 === 環境工程與管理系 === 106 === Aedes aegypti is one of the major mosquitoes for the dissemination of dengue fever. In this study, we use seven insecticides of different mechanisms to evaluate its efficacy against Aedes aegypti larvae of field and reference strains, to find resistance for old mechanic insecticides and novel insecticide in the future. We also compared the results of Aedes aegypti’s resistance this year with other past studies around the world, to find out the specific development of resistance of Aedes aegypti to commonly used insecticides around the world. The results showed Aedes aegypti generate high resistance to Bti of microbial pesticide in 2017, the resistance ratio (RR1)(based on LC50) and (RR2)(based on LC90) were 7.8 and 23.6, respectively, other previous agents such as Abamectin, Deltamethrin and Chlorpyrifos, their RR1 and RR2 values are from 0.9 to 5.4, respectively. The new mechanisms of insecticides such as Emamectin benzoate、Indoxacarb、Spinosad, their RR1 and RR2 are between 2.2 to 10.1, show that all insecticides ,except Emamectin benzoate and Indoxacarb can be used to prevent and control the Aedes aegypti. Over the years and in the 2017, the susceptibility of Aedes aegypti to f Chlorpyrifos of organophosphate does not induce any resistance, but Deltamethrin of pyrethrum does induce resistance and cause increase resistance to Bti. The new insecticide, Spinosad, shows its potential to prevent and control Aedes aegypti larvae in the field around the world.
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