山香圆平背粉虱Crenidorsum turpiniae (Takahashi)（CT）是首先在贵州湄潭地区发现的茶树新害虫，在该地发生普遍并造成较大威胁。项目组通过前期调查发现CT在我国茶区的分布逐步扩大，但国内外并无CT取食为害茶树或其他寄主的生物学特性基础数据。为了进一步认识该害虫和及时科学的防控，本项目拟开展CT种群遗传学及生物学特性的研究，通过连续多年CT样本的采集，结合国内同行对全国各地CT样本的收集，利用微卫星、mtDNA COI和rDNA ITS序列分析的方法研究CT不同寄主种群和不同地理种群的遗传多样性，明确其遗传分化格局；而后利用项目前期摸索的室内饲养方法完成对代表种群的室内继代饲养，明确CT实验种群生活历期、繁殖力等生物学特性及其差异。研究结果可为CT种群扩散规律探讨、精准检测和科学防控提供依据。

The whitefly species, Crenidorsum turpiniae (Takahashi) (CT), infesting tea plants was newly recorded tea insect pest which firstly found and took place frequently in Meitan County of Guizhou Province. Based on preliminary research, CTs were detected in some other tea plant producing regions. However, little was known about the population genetic structure, occurring generations, living habit and any other fundamental data. In this project, we would widely collect CT samples from different areas. Based on molecular markers of microsatellite (SSR), mitochondrial COI and ribosomal ITS gene segment, we would present the genetic diversity and structure of geographical and host population, and uncover the population genetic differentiation. Thereafter, by continuously rearing for CT generations, we would find out egg stage, adult stage, life time and fecundity of different populations. The conclusions of the project has important significance for further exploring origin and diffusion of CT populations, and present necessary reference for CT emergency and scientifically control.