【摘要】 本文组建了6个桑品种上的朱砂叶螨实验种群生命表,并测定了种群趋势指数(I)、内禀增长能力(r_m)、种群繁殖价(V)等参数,这些参数从不同角度反映了桑品种对朱砂叶螨种群的影响,其中,内禀增长能力是桑品种抗虫性鉴定的一个重要指标.6个桑品种对朱砂叶螨的抗性水平是以嘉陵9号为最强,其次是嘉陵16号、嘉陵新9号、桐乡青、新一之濑,而小冠桑最弱.更多还原

【Abstract】 Life tables were established of Tetranychus cinnabarinus (Boisduval) populations raisedunder laboratory conditions and fed with the blades of six mulberry breeds,and their popula-tion trend index (I),innate capacity of increase (rm),population reproductive values (V) andother parameters were calculated. Such parameters reflected the effects of different mulberrybreeds on the pest population and rm appeared to be an important parameter for the evalua-tion of pest resistance of any mulberry breeds. Of the 6 mulberry breeds studied,Jialing 9showed the strongest resistance to T. cinnabarinus, followed in sequence by Jialing 16,Jia-lingxin 9,Tongxiangqing, Xinyizhilai and Xiaoguansang.更多还原