据不完全统计,目前我国已有主要外来杂草107种,外来害虫32种,外来病原菌23种。这些外来生物的入侵给我国生态环境、生物多样性和社会经济造成巨大危害,仅对农林业造成的直接经济损失每年就高达574亿元。目前,外来物种对我国的危害表现在多个方面。首先,外采入侵物种会造成严重的生态破坏和生物污染。 According to incomplete statistics, there are 107 exotic alien weeds, 32 alien pests, and 23 exotic pathogens in China. The invasion of these exotic organisms has caused great damage to China’s ecological environment, biodiversity, and social economy. The direct economic losses caused to agriculture and forestry alone are as high as 57.4 billion yuan each year. At present, the harm of alien species to China is manifested in many aspects. First of all, invasive alien species can cause serious ecological damage and biological pollution.