1975年以来,桃小食心虫对我区苹果、梨、桃、杏、花红及枣等果树的危害日益严重,全区核果类、仁果类及枣树的受害面积约达60％。据1983年8月中旬到10月下旬对平凉、灵台、泾川及华亭四县果园调查:主要果树的虫果率达37.6％到85.7％之间,苹果中个别品种的虫果率高达95.6％。近几年来,有些果园虽进行过药剂防治,但由于对桃小食心虫在我区的发生规律认识不 Since 1975, Peach Mungbean insects have become more and more harmful to fruit trees such as apples, pears, peaches, apricots, red flowers and dates in our district. The affected area of ​​diced fruits, pome fruits and jujube trees accounts for about 60% of the total area. According to the investigation of the orchards in Pingliang, Lingtai, Jingchuan and Huating four counties in mid-August to late October 1983, the fruit fruit rates of the main fruit trees ranged from 37.6% to 85.7%, and that of the fruit varieties of individual varieties was as high as 95.6% . In recent years, although some of the orchards have been drug control, but because of the peach moth worms in our district, the occurrence of regular awareness