Evaluation of life table parameters of Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) fed on Tetranychus urticae Koch (Acari: Tetranychidae) and Bemisia tabaci Gennadius (Hem: Aleyrodidae)
عنوان دوره: اولین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
Amblyseius swirskii is one of the most important predators that has effective role in biological control of Tetranychus urticae and B. tabaci. The life table parameters of A. swirskii under laboratory conditions with 25±2 0C, 70±5% relative humidity and the photoperiod of 16L: 8D hours, with 100 replicates at the same time on T. urticae and B. tabaci were studied. Predator eggs were settled on cucumber leaf, individually. They were observed every 12 h, in immature stages and every 24 h in adult stage. The data were recorded for both female and male, separately. Life table parameters were determined by age-stage two-sex life table model. The development time from egg to adult of A. swirskii fed on T. urticae (6/58 ± 0/12) was significantly longer compared to that on B. tabaci (6/01 ± 0/13). Also the intrinsic rate of increase (rm), the net reproductive rate (R0), the finite rate of increase and the mean generation time (T) of A. swirskii on B. tabaci and T. urticae were 0/224±0/015, 0/120±0/015 day-1; 12/14±1/84, 3/90±0/63 offspring; 1/252±0/018, 1/128±0/017 day-1 and 11/08±0/23, 11/24±0/2 day, respectively. The findings of this research, as basic information could be used in biological control.
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