梨小食心虫Grapholitha molesta(Busck)简称梨小,国外叫东方果蛾,是一种世界性的果树害虫。主要为害苹果、梨、桃、李、杏等,在四川为害较严重。长期依赖化学农药防治,会导致害虫产生抗药性、污染环境和杀伤天敌等后果。近年来,国内外科技工作者正努力探索更安全、经济有效的害虫防治新途径。目前美国、日本等国, Grapholitha molesta (Busck) Referred to as pear small, called Oriental fruit moths abroad, is a worldwide fruit pest. The main damage to apples, pears, peaches, plums, apricots, etc., more serious damage in Sichuan. Long-term dependence on chemical pesticide control, will lead to pest resistance, environmental pollution and natural enemies and other consequences. In recent years, domestic and foreign scientists and technicians are working hard to explore a safer and more cost-effective new approach to pest control. At present, the United States, Japan and other countries,