Insecticide resistance and synergism of three fieldcollected strains of the German cockroach Blattella germanica (L.) (Dictyoptera: Blattellidae) from hospitals in Kermanshah, Iran
Insecticide resistance and synergism of three fieldcollectedstrains of the German cockroach Blattellagermanica (L.) (Dictyoptera: Blattellidae) fromhospitals in Kermanshah, Iran