Entomology Research Laboratory, Department of Life Sciences, Manipur University, Canchipur, Imphal – 795 003, India
*Corresponding author. E-mail: tksingh04@sancharnet.in
The number of Plutella xylostella that survived from egg to adult emergence was worked out. The net reproductive rate (R0) was 24.916 representing total female birth with a mean length of generation (T0) being 29.428. The population increase with intrinsic rate of increase (rm) was 0.1109 and finite rate of increase (λ) was 1.117 females/female/day. On reaching the stable-age distribution, the population comprised mainly of immature stages and further life at the time of adult emergence was reduced from 7.59 to 5.47 days.
Brassica juncea, Life table, Plutella xylostella, Stable age distribution
