梨小食心虫(Grapholitha molesta Busk.)属鳞翅目小卷叶蛾科,简称梨小。是为害苹果、梨、桃、李、杏等的一种世界性果树害虫,在我省苹、梨产区分布较普遍,尤以蓬溪、南川、金堂等地受害严重。四川“青苹”(商品名称,下同)在香港市场有较高声誉。莲溪县青苹产量居全省首位,但由于梨小发生代数多,繁殖数量大,规律不明,难以防治。1974年以前部分果园果实受害率在50％以上。为此,摸清梨小发 Grapholitha molesta Busk. Is a Lepidoptera small leaf roller moth family, referred to as small pear. It is a worldwide fruit pest that damages apple, pear, peach, plum, apricot and so on. It is widely distributed in the areas of apple and pear in our province, especially in Pengxi, Nanchuan and Jintang. Sichuan “Green Apple” (product name, the same below) in the Hong Kong market has a high reputation. Lianxi County, Greenpea output ranks first in the province, but because of the small number of generations of pear generation, breeding a large number, the law is unknown, it is difficult to control. Before 1974 some fruit damage in orchard in more than 50%. To this end, find out small pear hair