一般梨结实能力强 ,多数年份花果正常生长发育 ,为保证果大质优还需疏花疏果。然而 ,一些梨园由于花器发育不良 ,授粉树配置不合理 ,花期遇低温阴雨 ,药害 ,树体营养不足 ,黑星病和锈病等病虫为害及品种具采前落果特性等原因 ,造成大量落花落果 ,产量和质量均得不到保障。现将? Pear strong general ability, most of the normal growth and development of fruit of the year, in order to ensure the quality of fruit need to thinning thinning fruit. However, some pear orchards due to poor growth of flower, pollination tree configuration is irrational, flowering encounter low temperature and rain, phytotoxicity, lack of tree nutrition, scab and rust and other pests and diseases and the characteristics of the pre-harvest deciduous fruit and other reasons, resulting in a large number of falling flowers Fallen fruit, yield and quality are not guaranteed. Now?