Evaluation of Five Local Formulated Insecticides against German Cockroach (Blattella germanica L.) in Southern Iran
M Shahi 1, *AA Hanafi-Bojd 2, H Vatandoost 2
1 School of Public Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
2 Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Corresponding Author:
A.A. Hanafi-Bojd,
Tel: +98 21 88951393,
E-mail: این آدرس ایمیل توسط spambots حفاظت می شود. برای دیدن شما نیاز به جاوا اسکریپت دارید

Abstract:
Background: The German cockroach, Blattella germanica L., is a serious household and public health pest worldwide. Con¬trol of this species has been very difficult to achieve. Toxicity of cypermethrin EC10%, deltamethrin EC5%, diazi¬non EC0.5%, lambda-cyhalothrin EC5% and Negon® (permethrin+propoxur oil liquid1%) commercial for¬mula¬tions 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 con¬trol 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-recom¬mended doses of cypermethrin, deltamethrin, lambad-cyhalothrin, diazinon and permethrin+propoxur insecti¬cides, respectively. KT50 results were different from 5.68 min for permethrin+propoxur mixture to 240.37 min for cyper¬methrin. 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 ac¬tive ingredient of these insecticides.