中国梨木虱是我国北方数省梨产区的主要害虫，每年大面积发生。严重危害造成梨树早期落叶，果实被污染，质量降低，使果农收入减少。由于梨木虱若虫在刺吸梨树的汁液的同时，还分泌一种粘稠的物质，分泌物在几天内就可将若虫包埋，若虫在分泌物的保护下取食、危害，在防治时， Pear lice in China is a major pest in pear-producing areas in several provinces of northern China, which occur on a large scale every year. Serious damage caused early deciduous pear tree, the fruit is contaminated, reducing the quality of fruit farmers to reduce income. As pear lice nymphs suck pear juice while also secreting a viscous material secretions in a few days can be nymphs buried nymphs under the protection of secretions feeding, harm, in the prevention and treatment Time,