پديد آورندگان :
Nasirian, H نويسنده , Ladonni, H نويسنده , Shayeghi, M نويسنده , Vatandoost, H نويسنده , Yaghoobi-Ershadi, MR نويسنده , Rassi, Y نويسنده , Abolhassani, M نويسنده , Abaei MR نويسنده
چكيده لاتين :
Control of insect pests of agriculture, economic, and medical importance usually focuses on the use of insecticides. The
susceptibility levels of eleven strains of German cockroaches, Blattella germanica (L.), were compared with a standard susceptible
strain against permethrin and fipronil. The strains were collected from nine infested students’ dormitories and two
infested hospitals in Tehran, capital of Iran. The susceptible strain showed LD50 of 0.43 µg and 0.96 ng for permethrin and
fipronil respectively. Comparison of the resistance ratio of collected strain with susceptible strain showed resistance ratios
of 8.6 to 17.7-folds for permethrin and 1.5 to 2.6-folds for fipronil, respectively. The result of this investigation indicated
that the all strains were resistant to permethrin. Resistance spectrum of fipronil to permethrin showed different pattern of
susceptibility to fipronil, indicating that there was no relationship between resistance to permethrin and fipronil.
