Resistance to Chlorinated Hydrocarbons in Culex pipiens quinquefasciatus in Egypt

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Abstract
The toxicity of several insecticides was determined, by The WHO methods, on larvae and adults of a strain of southern house mosquitoes Culex pipiens quinquefasciatus Say (= fatigans Wiedemann), collected in 1964 from an area where insecticides had been used for their control since 1950. The most toxic compounds tested were isobenzan (Telodrin® and several organophosphates to the larvae, and Union Carbide UC-10854 (m-isopropylphenyl methylcarbamate), as well as methyl parathion to the adults. Both larvae and adults proved to be resistant to DDT and lindane. They were cross resistant to DDT analogs and several cyclodienes, but remained susceptible to organophosphates and carbamates.

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