پارامترهای جدول زندگی کنه شکارگر Amblyseius swirskii (Acari: Phytoseiidae) در نسل‌های مختلف با تغذیه از گرده بادام

The mass production of predatory mites is an appropriate approach to control greenhouse pests in integrated pest management programs. The long-term rearing of predatory mites on alternative diets may decrease or increase the efficiency of these mites. Amblyseius swirskii (Athias-Henriot) as one of the important biological control agents is used to control whitefly, thrips and recently two-spotted spider mites. In this study, the relatively long-term effects of almond pollen on Amblyseius swirskii life table parameters were evaluated after 1, 3 and 5 generations in laboratory conditions at 27 ±1 ° C, 65 ± 10 RH and a photoperiod of 16:8 (L:D) h. In addition, in four days interval fresh pollen was added to the rearing arena. The results showed that the total developmental time of immature mites in the 1st, 3rd and 5th generations was 5.23, 5.49 and 5.18 days, respectively, and the mean of adult longevity was 45.52, 46.24 and 44.78 days, respectively. The adult pre-oviposition period (APOP) in the fifth generation (2.47 days) and the first generation (2.34 days) was significantly lower than the third generation (3.35 days). Furthermore, the total pre-oviposition period (TPOP) of the fifth and first generation (7.67 and 7.76 days, respectively) was slightly different from that of the third generation (8.87 days). In addition, duration of oviposition period in the first, third and fifth generations was 18.31, 19.9 and 15.58 days, respectively. The intrinsic rate of increase (r) in the first and third generations (0.1737 and 0.1779 day-1, respectively) had a significant difference with the fifth generation (0.2244 day-1). The finite rate of increase (λ) for the first, third and fifth generations was 1.189, 1.194 and 1.274 days, which was significantly higher in the fifth generation than in the other generations. In addition, the mean generation time (T) for the first, third and fifth generations was 16.69, 17.08, and 13.73 days, respectively. According to the results, the value of The intrinsic rate of increase of the predator significantly increased in the fifth generation feeding on pollen and It is advisable that more generations be examined, for better understanding the potential of this predatory mite on pollen grains.