摘要：Rhyzobius lojphanthae Blaisdell (Coleoptera: Coccinellidae) is one o f the most important predators o f scale insects pests. In this study, development periods o f immature stages o f R. ^o;phanthae on Aspidi-otus nerii Bouche (Hemiptera: Diaspididae) at d ifferent constant temperatures (14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34 and 36 °C), 60% relative hum idity and 16:8 hour photoperiod, were investigated. The parameters o f the predator under different temperatures were calculated w ith RmStat-3.Development periods o f immature stages o f R.lophanthae on different temperatures demonstrated that egg development time at 14 °C longer than the other temperatures. In the all larval instars and pupae stage, the larval development periods become shorter, as the temperature increase. Total development time on different temperatures was found93.77, 77.14, 58.77, 41.36, 37.17, 29.79, 21.29,17.78, 15.31 and 20.63 days, respectively. Most o f the eggs died at 34 °C; only two eggs were able to enter in the first larval period and these larvae died in the first larval period.Besides, all o f the eggs died in this period at 36 °C. According to the results, it is possible to say that mass production o f the predator in laboratory conditions can be more economically and rapidly at the between 26 °C and 30 °C.
