Abstract:Biological invasion has become a serious ecological and economic concern in the international community as well as in China. Invasive exotic plants have caused vast damage to the biodiversity and the economy in China. Classical biological control of weed aims to suppress and achieve long term regulation of weed populations by introducing host-specific natural enemies from the native range of the weed. It is a self-sustainable and self-regulating management approach widely used in the world, while being syst...