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从秋季落叶后到春季发芽前，是苹果、梨树的休眠期。这一时期病虫越冬场所比较集中，龄期一致，冬眠时间长，活动能力弱。此期加强防治，省工、省药、效果好，对减轻果园全年的病虫危害，能起到事半功倍的作用。 1．清园。许多病源和害虫如苹果、梨腐烂病、轮纹病、早期落
From autumn leaves to spring before germination, apple, pear dormant period. During this period pests and wintering places are more concentrated, age consistent, long hibernation, activity is weak. This period to strengthen prevention and control, labor, medicine, good effect, to reduce orchard pests and diseases throughout the year, can play a multiplier effect. 1. Qingyuan. Many sources and pests such as apple, pear rot disease, ring rot, early fall