答山东读者李献水等同志你来信反映的问题,经分析认为属营养失调障害所引发的果树生理病害——缺硼症。该病不仅阻碍了树体的正常生长发育,而且严重影响果树产量与果品质量。由于许多果农对其认识不足,有的还误把果树缺素症造成的生理病害当成侵染性病害防治,给生产带来许多不应有的损失。 A Shandong reader Li Xianshui comrades and other letters you reflect the problem, the analysis that is caused by nutritional disorders disorders fruit tree physiological disease - boron deficiency disease. The disease not only hinder the normal growth and development of the tree, but also seriously affect the fruit yield and fruit quality. Due to the lack of understanding by many fruit growers, some mistakenly put the physiological diseases caused by fruit tree deficiency disease as an infectious disease prevention and control, which brought undue losses to the production.