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Paper Information

Journal:   JOURNAL OF ARTHROPOD-BORNE DISEASES   JUNE 2016 , Volume 10 , Number 2; Page(s) 178 To 191.
 
Paper: 

IRRITABILITY LEVELS OF FIELD AND LABORATORY POPULATION OF CULEX PIPIENS COMPLEX IN TEHRAN TO DIFFERENT GROUPS OF INSECTICIDES

 
 
Author(s):  RAHIMI SARA, VATANDOOST HASSAN*, ABAI MOHAMMAD REZA*, RAEISI AHMAD, HANAFI BOJD AHMAD ALI, RAFI FATEMEH
 
* DEPARTMENT OF MEDICAL ENTOMOLOGY AND VECTOR CONTROL, SCHOOL OF PUBLIC HEALTH, TEHRAN UNIVERSITY OF MEDICAL SCIENCES, TEHRAN, IRAN
 
Abstract: 

Background: The irritant effect of some insecticides can cause a proportion of mosquitoes to leave the sprayed rooms before acquiring a lethal dose, so the repeated contact al sub-lethal dose may lead to extent the resistance.
Methods: Larvae and pupae of Culex pipiens complex were collected in mass from open canals of waste water in capital city Tehran and reared to obtain the first generation at laboratory. Sugar-fed 2–3 days female mosquitoes were used for the experiments and compared with laboratory strain. The irritability tests of insecticides impregnated papers were measured in plastic conical exposure chambers placed which implemented at controlled conditions according to the method described by WHO .Number of take-offs were counted during 15 minutes of exposure time.
Results: DDT had the most irritancy effect against field population of Cx. pipiens. DDT, permethrin and deltamethrin was moderately irritable against laboratory strain, whereas, addition to three previous insecticides, malathion, cyfluthrin and propoxur should be also considered as moderately irritable insecticides for field population of. Irritability level of etofenprox, fenithrothion, bendiocarb, and lambdacyhalothrin did not differ from control group.
Conclusion: The irritability response of mosquitoes may have a negative impact on control measures. Periodical execution of irritability tests with insecticides that routinely used in vector control program is highly recommended.

 
Keyword(s): IRRITABILITY, INSECTICIDES, CULEX PIPIENS, TEHRAN, IRAN
 
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