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梨树二次开花指梨树当年分化的花芽在当年秋季就开花的现象。它消耗了树体的大量营养，浪费了第二年的结果花芽，对产量影响较大。其发生的主要原因有：（１）花芽分化期遇到高温干旱或者土壤长期积水等自然灾害，造成早期落叶，促使花芽提前萌发而在秋季开花。（２）病虫危害
The second flowering of pear tree refers to the differentiation of flower buds of pear then flowering in the fall of that year. It consumes a lot of tree body nutrition, waste the results of the second year flower buds, a greater impact on the yield. The main reasons for its occurrence are as follows: (1) Natural disasters such as high temperature and drought or long-term water accumulation in the flower bud differentiation period result in early deciduous leaves, leading to early germination of flower buds and flowering in autumn. (2) pest damage