پارامترهای رشد جمعیت و ظرفیت شکارگری کنه شکارگر Amblyseius swirskii (Phytoseiidae) با تغذیه از کنه گیاه‌خوار Eotetranychus frosti (Tetranychidae) پرورش داده شده روی دو رقم سیب

The life table parameters and predation capacity of Amblyseius swirskii Athias-Henriot (Phytoseiidae) fed on Eotetranychus frosti (Tetranychidae) nymphs reared on two apple cultivars (Gala Royal and Golden) under laboratory conditions at 25±1ºC, 60±10% RH, and a photoperiod of 16: 8 h (L: D). The obtained demographic data were analyzed using the two-sex life table. The Population growth parameters was significantly influenced by two apple cultivars. A significant difference was observed between the net reproductive rate (R0) on two apple cultivars. The highest and lowest net reproductive rate (R0) were obtained on Golden (26.51 eggs/individual) and Gala Royal (22.01 eggs/individual), respectively. The intrinsic rate of increase (r) ranged from 0.201 day-1 on Gala Royal to 0.265 day-1 on Golden. The mean generation time (T) on Gala Royal and Golden cultivars was 14.97, and 12.01 days, respectively. The highest and lowest finite rate of increase (λ) were obtained on Golden (1.282 day-1) and Gala Royal (1.197 day-1), respectively. The total prey consumption by all immature stages on Gala Royal and Golden was 28.35 and 16.54 prey, respectively. The total prey consumption by adult females was 513.95 prey on Gala Royal and 410.13 prey on Golden. The results of the data analysis of two apple cultivars based on some demographic parameters of A. swirskii mite showed that predator performance was strongly affected by feeding on E. frosti mites reared on different apple cultivars, and also a significant difference was seen in the hunting capacity of A. swirskii on different apple cultivars. The findings of the present study provide new information to design a more comprehensive IPM program for this pest in apple orchards.