7、8月份苹果、梨等果树进入果实膨大期,果树叶幕层已经形成,高温高湿的气候条件有利于密闭果园滋生病虫,这一时期危害果树的病虫主要有:早期落叶病、轮纹病、炭疽病、苹果树腐烂病、桃小食心虫、山楂叶螨、金纹细蛾、介壳虫、梨黑星病、梨木虱、梨黄粉蚜等,须加强防治。 In July and August, fruit trees such as apples and pears entered the period of fruit enlargement, and the leaf layer of fruit trees had formed. The climatic conditions of high temperature and high humidity were conducive to the growth of pests in enclosed orchards. The pests and diseases which endangered fruit trees during this period were: early deciduous diseases, Pentaphylosis, anthracnose, apple tree rot, peach moth, hawthorn spider mite, gold moth, scale insects, pear scab, pear psylla, pear yellow aphids, etc., to strengthen prevention and control.