Table 3 Life history traits of the pink bollworm

Net reproductive rate (R₀)

∑l_xm_x

276.72^a

184.27^b

Mean length of generation (T_c) /days

∑xl_xm_x/R₀

37.74^b

47.54^a

Innate capacity for increase in number (r_m)

ln R₀/T_c

0.15^a

0.11^b

Finite rate of increase (λ)

Antilog e^r_m

1.16^a

1.12^b

Arbitary ‘r_m’ (r_c)

-

0.15^a

0.11^b

Weekly multiplication of population

(λ)^w

2.86^a

2.16^b

Doubling time (DT) /days

ln 2/r_m

4.62^b

6.30 ^a

Potential fecundity (PF)

∑m_x

634.11^a

545.06^b

No. of hypothetical F₂ females

(R₀)²

76 572.41^a

33 955.65^b