Toxic effect of chlorantraniliprole on the biological parameters of Spodoptera litura

The toxic effect of chlorantraniliprole (0.0002%) was tested over two generations on Spodoptera litura through treated leaf discs (3 mm). The survival of S. litura was 40 days in untreated groups which decreased to 35 and 33 days in the treated first and second generations, respectively. The oviposition period was 7 and 6 days in first and second generations of treated groups, respectively. Generational mortality was higher in the treated groups of second than first generations. The highest natality occurred at the pivotal age of 37.5^th day, where 79.4 and 72.2 females/female were borne in untreated and decreased in treated groups in the first and second generations, respectively. Potential fecundity was 380.30 females/female/generation and 306.55 in the first and second generations in treated groups, respectively, compared to 619.16 and 609.83 in untreated one. The net reproductive rate was significantly higher in the second than first generations in untreated while decreased in treated groups. The intrinsic rate of increase was 0.1303 females/female/day in the first and 0.1400 for second generations in untreated while non-significant in both generations of treated groups. Mean generation time significantly differed in both generations of treated groups. Doubling time was significantly/non-significantly the same in both treated/untreated generations.