| Summary: | 碩士 === 國立臺灣大學 === 植物病蟲害學系 === 84 === A 23.2-fold level of resistance to α-cypermethrin in Aedes
aegypti Ling-ya strain was found in this study. In vivo tests
it revealed that this strong synergism 23.6-fold ofα-
cypermethrin in the resistant strain by PB (piperonyl butoxide)
but little effect by DEM (diethyl maleate) 2.8 fold, DEF (S.S.S-
tributyl phosphorotrithioate) 3.36 fold and TPP (triphenyl
phosphate) 7.6 fold. Higher specifics activite of
carboxylesterase (1.5-fold). N-demethylase (7.6 fold). aldrin
epoxidase, acetylcholinesterase, but lower glutathione S-
transferase in resistant strain than suscepbltible strain. The
α-cypermethrin resistant mechanism of Ling-ya strain of Aedes
aegypti was shown to be due to the increased metabolism of the
toxicant by mixed functional oxidases.
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