Author/Authors :
Ghorbani, Fatemeh Department of Medical Entomology and Vector Control - School of Public Health - Tehran University of Medical Sciences, Tehran, Iran , Vatandoost, Hassan Department of Medical Entomology and Vector Control - School of Public Health - Tehran University of Medical Sciences, Tehran, Iran , Hanafi-Bojd, Ahmad Ali Department of Medical Entomology and Vector Control - School of Public Health - Tehran University of Medical Sciences, Tehran, Iran , Abai, Mohammad Reza Department of Medical Entomology and Vector Control - School of Public Health - Tehran University of Medical Sciences, Tehran, Iran , Nikookar, Hassan Department of Medical Entomology and Vector Control, Student Research Committee, Health Sciences Research Center - School of Public Health - Mazandaran University of Medical Sciences, Sari, Iran , Enayati, Ahmad Ali Department of Medical Entomology and Vector Control - School of Public Health - Sari University of Medical Sciences, Sari, Iran
Abstract :
Background: Culex pipiens is a mosquito species distributed in different parts of Iran. It is known as vector of some diseases as well as a nuisance insect. A successful control campaign needs to study the biology, ecology and suscep-tibility status of the target pest. The aim of this study was to investigate the susceptibility status of Culex pipiens to some insecticides recommended by WHO in north of Iran.
Methods: Larvae were collected from different breeding places in Sari County by standard dipping method. They were reared to adult stage in an under standard condition. World Health Organization (WHO) standard test kits and the diagnostic dose of 12 imagicides were used for adults, while two larvicides were used against larvae.
Results: The least and highest mortality rates after exposure to insecticides were 4.7% (Propoxur 0.1%) and 76.4% (Etofenprox 0.5%), respectively. Larvae showed high resistance to temephos (19.19%) and malathion (54.63%). Culex pipiens was found to be resistant to all used insecticides/larvicides at diagnostic dose.
Conclusion: Intensive use of pesticides against agriculture and urban pests increased the resistance level of this spe-cies to different insecticides, although currently there is no control program against it. Study on the mechanisms of resistant in this species to different insecticides is recommended.
Keywords :
Culex pipiens , Insecticide resistance , Temephos , Propoxur , Deltamethrin
