Evaluation of Five Local Formulated Insecticides against German Cockroach (Blattella germanica L.) in Southern Iran

  • M Shahi School of Public Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
  • AA Hanafi-Bojd Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  • H Vatandoost Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Keywords: German cockroach, Commercial insecticides, Resistance, Hospital, Iran,


Background: The German cockroach, Blattella germanica L., is a serious household and public health pest worldwide. Con­trol of this species has been very difficult to achieve. Toxicity of cypermethrin EC10%, deltamethrin EC5%, diazi­non EC0.5%, lambda-cyhalothrin EC5% and Negon® (permethrin+propoxur oil liquid1%) commercial for­mula­tions were investigated against adult males of German cockroaches collected from four hospitals of Bandar Abbas City, southern Iran, during 2006. These insecticides have been used for cockroach con­trol in this city.Methods: The tests were carried out only on males by the glass jar contact method recommended by the WHO.Results: Maximum mortality rates of 20, 35, 90, and 100% were obtained after one hour contact to label-recom­mended doses of cypermethrin, deltamethrin, lambad-cyhalothrin, diazinon and permethrin+propoxur insecti­cides, respectively. KT50 results were different from 5.68 min for permethrin+propoxur mixture to 240.37 min for cyper­methrin. German cockroach showed < 80 per cent mortality using three pyrethroid insecticides.Conclusion: It seems that the label-recommended concentrations of these insecticides were wrong and lower than WHO advised for cockroach control. For monitoring of resistance it is recommended to do more tests using the pure ac­tive ingredient of these insecticides.


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How to Cite
Shahi M, Hanafi-Bojd A, Vatandoost H. Evaluation of Five Local Formulated Insecticides against German Cockroach (Blattella germanica L.) in Southern Iran. J Arthropod Borne Dis. 2(1):21-27.