Age Stage Two-Sex Life Table Reveals Sublethal Effects of Some Herbal and Chemical Insecticides on Adults of Bemisia tabaci (Hem.: Aleyrodidae)

Table 2

Comparison of life table parameters of B. tabaci calculated by two different methods: the age-specific female life table and the age-stage two-sex life table; different letters show significant differences at 0.05 level.

Treatments	The intrinsic rate of increase (r)		The finite rate of increase (λ)		The net reproductive rate (𝑅0)		The mean generation time (T)
	Female life table	Two-sex life table	Female life table	Two-sex life table	Female life table	Two-sex life table	Female life table	Two-sex life table
Control	0.080 ± 0.007	0.076 ± 0.006	1.08 ± 0.007	1.079 ± 0.006	8.85 ± 1.89	7.23 ± 1.13	26.33 ± 0.22	26.23 ± 0.23
Pymetrozin	0.045 ± 0.017	0.036 ± 0.004	1.04 ± 0.018	1.036 ± 0.004	3.09 ± 0.14	2.45 ± 0.29	33.30 ± 8.28	25.28 ± 0.30
Neemarin	0.041 ± 0.009	0.046 ± 0.004	1.04 ± 0.010	1.047 ± 0.004	2.78 ± 0.07	2.99 ± 0.30	28.18 ± 7.08	25.64 ± 0.53
T. polium	0.048 ± 0.005	0.044 ± 0.005	1.06 ± 0.010	1.045 ± 0.006	4.46 ± 0.17	2.82 ± 0.58	31.78 ± 6.14	30.76 ± 4.38
C. procera	0.041 ± 0.009	0.049 ± 0.002	1.04 ± 0.009	1.050 ± 0.002	2.67 ± 0.06	3.18 ± 0.24	26.27 ± 6.59	25.43 ± 0.28
Th. vulgaris	0.064 ± 0.011	0.058 ± 0.004	1.06 ± 0.012	1.059 ± 0.004	4.95 ± 0.24	3.67 ± 0.33	31.62 ± 5.99	26.63 ± 0.73
F. parviflora	0.069 ± 0.006	0.064 ± 0.003	1.07 ± 0.006	1.065 ± 0.003	5.70 ± 0.14	4.91 ± 0.55	27.07 ± 2.88	26.78 ± 0.41