李小食心虫是李生产中的主要害虫之一。自1989年我区大面积引种李以后 ,该虫在我地为害严重。据观察 ,李小食心虫以老熟幼虫在树下 1～6ｃｍ土层中 ,以及石块、树皮缝隙内结茧越冬 ,4月中旬开始陆续破茧出土 ,4月下旬老熟幼虫出现 ,5月下旬第一代幼虫开始为害幼果 ,6月下旬 Li Xiaogong worms are one of the major pests in Li’s production. Since 1989, a large area in my area introduced  Li, the insects in me seriously. According to the observation, the larvae of Borrelia mongolica mature larvae in the soil layer under the tree 1 ~ 6cm, and the cocoon in the rock and bark crevice through the winter, beginning in mid-April after another cocoon unearthed, in late April mature larvae appear, 5 The first generation of larvae begin to harm young fruits in late June, late June