Effects of indoxacarb at sublethal concentrations on the development and activities of detoxification enzymes of Spodoptera litura.

Based on the bioassay results,3rd instar larvae of Spodoptera litura were treated with indoxacarb at concentrations corresponding to LC15,LC10 and LC5 by artificial diet dipping methods.Lower pupation rate,emergence rate and egg hatchability were observed when compared with control,and adult longevity and eggs laid per female decreased significantly when exposed to indoxacarb at LC15 concentrations.These results indicated that indoxacarb at sublethal concentrations had a negative effect on population development of S.litura.Furthermore,the activities of esterase,glutathione S-transferase and mixed function oxidase were compared between indoxacarb treated larvae and control,and no significant difference was observed,suggesting that indoxacarb at sublethal concentrations had no obvious effect on activities of these three detoxification enzymes.