转基因741林中杨扇舟蛾实验种群生命表研究

Population Life Table of Clostera anachoreta Fabricius in Transgenic Hybrid Poplar 741

通过在转基因741杨林中,对靶标害虫杨扇舟蛾Clostera anachoreta Fabricius种群生命表的比较研究,证明了转基因741杨林中杨扇舟蛾的世代存活率与对照相比显著降低,种群趋势指数降低了13.43-19.26倍,表明转基因杨可以减少靶标害虫的自然种群数量。经存活曲线分析得知杨扇舟蛾种群的个体死亡主要发生在幼龄幼虫期,特别是对1-2龄幼虫的致死能力更为明显。经过对转基因741杨林中杨扇舟蛾各死亡因子的致死力比较分析可知:由毒蛋白直接引起的食物和环境共同作用、病菌致死以及间接引起的化蛹死亡率升高的最为明显。

Life tables of Clostera anachoreta Fabricius were established which were fed with 2 kinds of transgenic 741 poplar and the control. The result showed that the indexes of population trend of the pest in transgenic poplar were 5.65~13.13 times lower than the control, that＇s means transgenic 741 poplar can reduce the density of target insect population. The highest mortality occurred at the boring stage of young instars larvae, obviously higher than the control, the most clear death factor among all were food and environment cooperation factor, diseases and the pupa natural death caused by the transgenic poplar.