Abstract:  In order to provide a scientific basis for understanding the effects of the insecticide chlorantraniliprole on Ostrinia furnacalis (Guenée), diet-incorporation bioassays were used to examine the toxicity of chlorantraniliprole to O. furnacalis, and the sublethal effects of the insecticide were investigated using life table analyses under laboratory conditions. The results showed that the LC₁₀, LC₄₀, and LC₅₀ values of chlorantraniliprole on the 3rd instar larvae of O. furnacalis were 0.038, 0.098, and 0.123 mg a.i./L, respectively. After the 3rd instar larvae were treated with LC₁₀ and LC₄₀ levels of chlorantraniliprole, the larval and pupal development were significantly delayed, adult longevity was significantly decreased and fecundity also decreased compared to the control, but the pupal weight (female: P=0.337, male: P=0.121), egg hatchability (P=0.087) and sex ratio (P=0.379) were not affected. Reproduction parameters, such as the net reproductive rate (R₀), intrinsic rate of increase (r_m), and finite rate of increase (λ) in the treatment groups were significantly lower than those in the control group. These results suggest that the LC₁₀ and LC₄₀ concentrations of chlorantraniliprole may reduce the population growth of O. furnacalis.

Key words: Ostrinia furnacalis, chlorantraniliprole, sublethal effects, biological parameters, toxicity