梨小食心虫是我市梨树的主要害虫,直接影响梨果的产量和品质,成为当前生产上急待解决的问题。1980～1981年对该虫进行了观察研究,初步掌握其发生规律及防治方法。但是,防治效果总是不太理想。偶而发现梨大虫果内飞出梨小成虫,在饲养的梨大虫果纱罩里,羽化出许多梨小成虫,这一现象引起我们的注意,联系在实践中,没有桃 Pear mungbean pest is the main pests in our city pear, a direct impact on the yield and quality of pear, become the current production of urgent problems to be solved. From 1980 to 1981, the pest was observed and studied, and its occurrence and prevention methods were initially mastered. However, the effect of prevention is always less than ideal. Occasionally found pear pear fruit flying out of the small adult pear, pears in the breeding insects yarn cover, the emergence of many young pearlings, a phenomenon that caught our attention, in practice, no peach