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[Insecticide resistance and irritability of Culex pipiens in Moscow]
Abstract:
Resistance and irritability to permethrin, deltamethrin, bendiocarb, propoxur, fenitrothion, malathion, dieldrin and DDT (WHO standard papers) were determined in Culex pipiens collected in the basements of big houses in the centre of Moscow. Mosquitos were found to be moderately resistant to fenitrothion (87% mortality), DDT (83%) and propoxur (80%), and susceptible to the remaining insecticides. The irritability was low to dieldrin but moderate to permethrin, propoxur and DDT, and high to the rest. The irritability to bendiocarb seems to be really caused by the repellent action of citric acid which the WHO standard paper is impregnated with. It is recommended to use pyrethroids against mosquito larvae and pyrethroid brickets against adults.
Insights
Culex pipiens mosquitoes in Moscow show moderate resistance to fenitrothion, DDT, and propoxur. Pyrethroids are recommended for controlling mosquito larvae and adults.
Area of Science:
- Entomology
- Medical Entomology
- Pest Control
Context:
- Investigates insecticide resistance in Culex pipiens mosquitoes.
- Focuses on mosquito populations in urban environments (Moscow).
- Evaluates resistance to a range of WHO-recommended insecticides.
Purpose:
- To determine the levels of resistance and irritability to specific insecticides in Moscow Culex pipiens populations.
- To inform effective mosquito control strategies.
Summary:
- Culex pipiens mosquitoes in central Moscow exhibited moderate resistance to fenitrothion (87% mortality), DDT (83%), and propoxur (80%).
- Susceptibility was observed for other tested insecticides.
- Irritability varied, with high irritability to most insecticides except dieldrin. Bendiocarb irritability was attributed to citric acid in WHO papers.
Impact:
- Provides crucial data on insecticide resistance for public health interventions.
- Recommends the use of pyrethroids for both larval and adult mosquito control.
- Highlights the need for ongoing monitoring of insecticide efficacy in urban vector populations.