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Table 3 Population growth parameters of E. formosa parasitising fourth nymphal instars of T. vaporariorum

From: Relative preference and demographic parameters of Encarsia formosa Gahan against Trialeurodes vaporariorum (Westwood)

S. No. Parameter Estimate±SE
Third instar Fourth instar
1. Gross reproductive rate (GRR) (females/female) 27.78±0.33 29.93±0.43
2. Net reproductive rate (R0) (females/female) 26.71±0.56 27.15±0.57
3. Approximate generation time (Tc) (days) 22.53±0.26 20.89±0.28
4. Innate capacity for natural increase (rc) (females/female/day) 0.1458±0.001 0.1581±0.002
5. True intrinsic rate of increase (rm) (females/female/day) 0.1472±0.001 0.1596±0.002
6. True generation time (T) (days) 22.32±0.25 20.69±0.27
7. Finite rate of natural increase (λ) (females/day) 1.16±0.002 1.17±0.002
8. Weekly multiplication rate (WM) (folds) 2.80±0.03 3.06±0.03
9. Doubling time (DT) (days) 4.71±0.04 4.34±0.04