Life Table of Spotted Bollworm, Earias vittella on Okra

The survival fraction at egg, early and late larval stages was 0.840, 0.845 and 0.90, respectively. Indispensable mortality was 10.24, 9.92 and 6.27 at egg stage, early and late instar larval stages, respectively. The net reproductive rate (R_o) was 90.35 females/female, length of generation (T_c) was 34.51 days, potential fecundity (pf) was 125.30 numbers of eggs, hypothetical F₂ female 8163.12 females/female while, intrinsic rate of increase (r_m) was 0.1305 females/female/day, the finite (ë) and annual rate of increase (A.R.I.) 1.1394, 4.807 x 10²⁰ respectively. The doubling time (DT) was 5.3107 days.