Glutathione S-Transferase and Insecticide Resistance in Laboratory Strains and Field Populations of Musca domestica

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Glutathione S-transferase (GST) activity of 10 house fly laboratory strains and 21 field populations are described with two substrates, 1-chloro-2,4-dinitrobenzene (CDNB) and 3,4dichloronitro-benzene (DCNB), commonly associated with resistance. Three laboratory strains selected by tetrachlorvinphos, lindane (γ-HCH) and dimethoate, respectively, had significantly elevated CDNB- and DCNB-GST activities. The multiresistant field population 791a had significantly elevated CDNB- and DCNB-GST activities. Many strains recorded several individuals with high CDNB- and/or DCNB-GST activity and to evaluate these differences, phenotypes were defined by cluster analysis. A phenotype, GST-R, indicating high CDNB- and DCNB-GST activities, was found in 23 of 31 laboratory strains or field populations. GST-R was likely to be involved in γ-HCH resistance in strain 17e, tetrachlorvinphos resistance in strain 39m2b, and dimethoate resistance in strain 49r2b. The frequency of GST-R in selected laboratory strains and field population correlated with the frequency of house flies surviving the organophosphate azamethiphos either topically applied or by ingestion. There was no significant correlation between GST activity and the toxicity of the organophosphate dimethoate or the pyrethroids bioresmethrin and pyrethrin.

Keywords: Musca domestica; glutathione S-transferase; insecticide resistance

Document Type: Research Article

Publication date: August 1, 2005

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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