【摘要】 在室内利用培养皿叶碟饲养法研究了朱砂叶螨在转Bt基因棉叶和常规棉叶上连续饲喂时各代种群增长的情况。结果表明,经过12代的饲养后,与常规棉相比,转Bt基因棉对朱砂叶螨的净增殖率、内禀增长率、平均寿命、种群加倍时间等生命参数无显著影响,显示出在短期内转Bt棉的种植均不会明显地表现出对朱砂叶螨种群的增长呈有利或有害的迹象。更多还原

【Abstract】 Life parameters of Tetranychus cinnabarinus on Bt transgenic cotton was studied by leaf feeding bioassay.No significant differences were obsevered in net reproductive rate,intrinsic growth rate,finite increase rate and other parameters between population feeding on Bt cotton leaves and that feeding on conventional cotton leaves.These indicated that there were no negative or positive impacts of Bt transgenic cotton on survival and reproduction of Tetranychus cinnabarinus in short term.Therefore,the relatively large population density of T.cinnabarinus in Bt cotton fields might be caused by reducing of pesticide usage and ineffective controlling by the nature enemies.更多还原