Chinese Journal of Entomology (1996) 16, 13-23

Sin-Chung Liao, Err-Lieh Hsu and William Can-Jen Maa (1996)
[Resistance mechanisms of houseflies to dichlorvos and irimiphos-methyl in three areas of northern Taiwan]
Chinese Journal of Entomology 16 (1), 13-23
Abstract: Luotung (LT), Suinkeng (SK) and Keelung (KL) housefly populations were examined for insecticide resistance. When compared with a susceptible (S) strain, resistance to dichlorvos by wild (R) houseflies ranged from 18 to 31 fold; resistance to pirimiphos-methyl of R flies ranged from 14 to 94 fold. Bioassay synergist and in vitro enzyme activity studies showed that the mechanisms of resistance to dichlorvos and pirimiphos-methyl for LT flies, included increased activities of microsomal oxidase, glutathione transferase and general esterase. The general esterase and acetylcholinesterase (AChE) insensitivity may be involved in the resistance mechanism of SK flies to these 2 insecticides. However, microsomal oxidase was the major contributor to the resistance to dichlorvos, as well as all possible metabolized detoxification enzymes involved in the resistance to pirimiphos-methyl for KL houseflies. Finally we suggest that the reduced penetration of insecticides through the cuticle, and insensitivity to AChE were the common important resisant factors in the houseflies of these 3 areas in northern Taiwan.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Err-Lieh Hsu

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Musca domestica		Taiwan