Life Table, Rate of increase and stable age distribution of Spodoptera litura (Fabricius) on cotton

The studies on life fecundity tables of Spodoptera litura were carried out on cotton at 27±1°C under laboratory conditions. The next reproductive rate (Ro) was 316.14 females with the generation period (T) of 39.75 days. The innate capacity for increase (Rm) and finite rate of increase (λ) were found to be 0.1448 and 1.1558 females/day, respectively with a weekly multiplication rate of 2.7555 times. The per cent contribution of eggs, larvae, pupae and adults were 54.4, 42.4, 2.6 and 0.4, respectively at stable age distribution of S. litura on cotton.