一、进入害虫的重要性根据英国昆虫研究所印行的《害虫分布图》,在350个农业害虫中,分布区不连贯并跨两个以上生物地理区的有221个(63.1％),其中最多的是木虱、粉虱、蚜、蚧等所谓胸喙亚目昆虫,绝大部分是遍布世界的。这种粗略的分析显示虫体扩散是害虫进入新区的主要方式。由于上述几类昆虫虫体 Importance of Entering Pests According to the “Pest Distribution” printed by the British Insect Institute, out of 350 agricultural pests, there are 221 (63.1%) of the inconsistent areas and across more than two biogeographies, most of which Is the psyllids, whitefly, aphids, scales and other so-called beak suborder insects, the vast majority are all over the world. This rough analysis shows that the spread of parasites is the main way for pests to enter new areas. Due to the above types of insect parasites