Preliminary Studies on the Survival and ReproductiveCapacity of Spodoptera depravata

Spodoptera depravata is a new insect pest that damages lawns in our country. Its developmental durations occurred in mid-June to late July under natural temperature at culture box were studied and experimental population life table under nature temperature in laboratory was constructed. The results showed that the survival rate was 46.61%. Some parameters were obtained as follows: Generation survival rate was 48.31%. R_0 =36.057 5, T =38.327 9 d, r_m =0.093 5, λ =1.098 0, d_t =7.413 3 d. R_0, T, r_m, λ, d_t were net reproductive rate, mean duration of a generation, innate capacity for increase, finite rate of increase and double time for population, respectively.