Annals of Plant Protection Sciences
  • Year: 2007
  • Volume: 15
  • Issue: 1

Life table, stable age, distribution and life expectancy of Aphis gossypii glover on okra

  • Author:
  • M.A. Sattar Shah, T.K. Singh, G.K.N. Chhetry
  • Total Page Count: 4
  • Page Number: 57 to 60

Department of Zoology, Lilong Haoreibi College, Lilong 795 130, Manipur, *Department of Life Sciences, Manipur University, Imphal 795 003, India.

*Correspondence author: Email: tksingh06@yahoo.co.in

Abstract

Life table and age specific fecundity of aphis gossypii was studied on Okra in the laboratory (26.05 ± 0.71°C temperature, 79.55 ± 1.28% R.H.). The net reproductive rate was evaluated as 26.62 females/female/generation. The intrinsic rate of increase (rm) and finite rate of increase (λ) were worked out as 0.312 and 1.379 females/female/day, respectively. On reaching the stable age distribution, the population comprised mainly of nymphs and the life expectancy (ex) of A. gossypii declined gradually with the advancement of age.

Keywords

Abelmoschus esculentus, Aphis gossypii, Life table