Interaction of gamma radiation and deltamethrin on resistant and susceptible strain of Trogoderma granarium

Abstract

A study was conducted during 2006 on the interaction of gamma radiation and deltamethrin against susceptible and resistant strain of Trogoderma granarium (Everts). Two doses of radiation, i e 0.02 and 0.06 KGy were applied on susceptible as well as deltamethin-resistant strain of T. granarium. After radiation, insects were bioassayed with deltamethrin. The LC50 of deltamethrin for susceptible strain was 0.0249 % which was decreased to 0.0069 % when insects were irradiated at 0.02 KGy. As the treatment dose increased to 0.06 KGy the LC50 was further decreased to 0.0039% with susceptible strain. Similar to the susceptible strain the susceptibility of deltamethrin resistant strain was also increased to 2-fold against deltamethrin after radiation.