فراسنجه های زیستی و جدول زندگی دو جنسی سن- مرحله ‏ی سفیدبالک گلخانه Trialeurodes vaporariorum

Biological parameters and age-stage two-sex life table of greenhouse white fly Trialeurodes vaporariorum (Westwood) (Hem.: Aleyrodidae) was studied in laboratory at 25 ± 2 ° C, RH 65 ± 10% and a photoperiod of 16: 8 h (L: D) on tomato, cucumber and eggplant using TWOSEX-MSChart (version 2015.002) software. The means and SEs were estimated using 100,000 Bootstrap replications. Based on the results, pre-adult developmental time of the pest on tomato, cucumber and eggplant were 25.37±0.15, 23.34±0.19 and 21.87±0.17days; longevity were 39.06±1.73, 42.24±1.68 and 45.41±1.65 days, and fecundity were estimated to be 139.29±4.66, 156.73±5.01 and 233.93±8.2 (eggs/ female), respectively. The survival rates of the pre-adult stages in the three host plants were 82, 85 and 91 percent, without significant differences. Comparison of the means of population growth parameters showed that in terms of the intrinsic rate of population increase (r) and net reproduction rate (R0) of the greenhouse white fly, the plants are divided into two separate groups. The intrinsic rate of population increase (r) in tomato, cucumber and eggplant were 0.118±0.005, 0.128±0.005 and 0.144±0.005 (d-1) respectively. With a significant differences, highest and lowest net reproduction rate (R0) were obtained in eggplant (108.90±15.76 eggs) and tomato (57.35±8.53 eggs), respectively. The finite rate of population increase (λ) in tomato, cucumber and eggplant were 1. 125 ± 0.055, 1.137 ± 0.005, and 1.555 ± 0.066 (day-1) and the generation time (T) were 34.34 ± 0.26, 33.08 ± 0.42 and 32.52 ± 0.32, respectively. The results of this study showed that greenhouse white fly biological parameters could be affected by host plants. Accordingly, due to higher survival rate, more fecundity, shorter pre-adult period and longer longivity of greenhouse whitefly in eggplant, this plant is more suitable host for the pest than the other two plants.