苹果树顶芽早春不萌发或晚萌发,在淄博地区普遍发生,业已影响着苹果产量。一般误认为是冻害。作者自一九七九年开始,经过八年的探讨观察,初步认为不是冻害,而是一种缺硼症状,初定为苹果缺硼枯芽病。现将调查和试验结果整理如下。 Top buds of apple trees do not germinate or germinate in early spring, and occur frequently in Zibo area, which has affected the production of apple. Generally mistaken for frozen damage. The author since 1979, after eight years of observation and observation, initially considered not frost damage, but a lack of boron symptoms, initially identified as apple bornellosis. The survey and test results are summarized below.