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Organophosphate Resistance and Esterase Pattern in a Natural Population of the Southern House Mosquito from California

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Abstract:

The esterase pattern of locus Est-B and the oregano phosphate (OP) resistance genotype of single mosquitoes from a natural population of Culex quinquefasciatus Say were investigated. The Est-B polymorphism was found to involve: a) allozymes with different electrophoretic mobilities (Esterase-1 and -2), and b) allozymes with different staining intensities (Esterase-2a, -2b, and -2c). The most active allozyme (Esterase-2c) is always associated with OP-resistant genotypes, while the less active allozymes (Esterase-1 and -2a) with OPsusceptible genotypes.

It also appears that Esterase-2b, which has a slightly higher activity than Esterase-1 or Esterase-2a, is associated with a small decrease in OP susceptibility.

The role of Est-B locus in OP resistance is discussed.

Document Type: Research Article

Publication date: August 1, 1980

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  • 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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