Biology and population growth parameters of jasmine whitefly, Aleuroclava jasmini on four different orange cultivars

Biology and population growth parameters of Jasmine whitefly, Aleuroclava jasmini (Takahashi) were studied on four orange cultivars including Siavaraz, Valensia, Mars and Washangton under laboratory conditions (27 ± 1 oC, 60 ± 5% RH and 14: 10 h L: D). The mean immature developmental times of females on Siavaraz, Valensia and Mars were 31.38 ± 0.23, 28.43 ± 0.68 and 29.20 ± 0.67 days, respectively. A. jasmini survived only up to third nymphal instar on Washington cultivar. Immature mortality was 25.77 ± 0.43, 32.00 ± 0.29 and 32.00 ± 0.52% on the above cultivars, respectively. Mean sex ratios (percent of females) were 59.45 ± 0.45, 54.05±0.63 and 51.76 ± 0.44% on above mentioned cultivars, respectively. The mean females longevity was 3.40 ± 0.11, 5.15 ± 0.20 and 4.60 ± 0.22 days, respectively, on cultivars. Mean total fecundity was 25.53 ± 1.45, 40.00 ± 1.62 and 33.66 ± 1.87 eggs on cultivars, respectively. Intrinsic rate of increase (rm) was 0.055 ± 0.001, 0.065 ± 0.003 and 0.060 ± 0.002 number of female/female/ day and Net reproductive rate (R0) was 6.46 ± 0.51, 7.71 ± 0.54 and 11.41 ± 0.60 offspring/individualon the above mentioned cultivars. Finite rate of increase (λ) was 1.05 ± 0.001, 1.06 ± 0.003 and 1.07 ± 0.002 per days and Mean generation time (T) was 33.6 ± 0.221, 31.09 ± 0.435 and 31.69 ± 0.639 days on the above mentioned cultivars. Doubling time (DT) was 12.48 ± 0.106, 10.55 ± 0.186 and 9.02 ± 0.183 days on the above mentioned cultivars. Based upon the biological characteristics and life table parameters, Valensia was found to be the most suitable cultivars for development and reproduction of A. jasmini.