Pest Management Science (2008) 64, 185-190

Lan Zhang, Jing Shi and Xiwu Gao (2008)
Inheritance of beta-cypermethrin resistance in the housefly Musca domestica (Diptera: Muscidae)
Pest Management Science 64 (2), 185-190
Abstract: BACKGROUND: Beta-cypermethrin, a synthetic pyrethroid insecticide, was applied frequently in the control of health pests including houseflies, Musca domestica L., in China. However, different levels of resistance to beta-cypermethrin were monitored in field strains of houseflies. A strain of M. domestica, 4420-fold resistant to beta-cypermethrin after continuous 25 generations of selection, was used in this paper to determine the mode of inheritance of pyrethroid resistance.
RESULTS: The estimated realized heritability (h2) of beta-cypermethrin resistance was 0.30 in this resistant strain. Results of bioassays showed no significant difference in values of LD₅₀ and slope of log dose-probit lines between reciprocal progenies F₁ and F₁, and yielded values of - 0.10 (F₁) and - 0.11 (F₁) for the degree of dominance (D). Chi-square analysis from responses of self-bred and backcross progenies (F₂, BC₁ and BC₂ respectively) indicated that the null hypothesis, a single gene responsible for resistance, was accepted. The minimum number of independent segregation genes was 0.93 for F₁ by Lande's method.
CONCLUSION: It was concluded that beta-cypermethrin resistance in the housefly was inherited as a single, major, autosomal and incompletely recessive factor. These results would provide the basic information for pest management programmes.
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Link to article at publishers website
Database assignments for author(s): Xi-Wu Gao

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