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柑桔冬季异常落叶是导致植株死亡的一大威胁,这种状况历来都发生在小年的结果树上。引起柑桔异常落叶的主要原因是无果柑桔一到秋末就产生大量的脱落酸,使植株过早进入休眠期。首先表现在未老熟的秋稍因缺乏养分而叶脉呈黄,叶片出现斑驳状黄块而先后脱落,接着老叶脱落。每年平均有4—6％的植株死亡,严重年份超过10％,其损失不可轻视。
Abnormal winter deciduous leaves of citrus are a major threat to plant death, a condition that has traditionally occurred in the tree of results of the small year. Abnormal citrus caused the main reason for deciduous fruitless citrus to the late autumn to produce a lot of abscisic acid, so that plants prematurely into dormancy. First manifested in the immature autumn slightly due to lack of nutrients and veins yellow, mottled leaves appeared yellow and then off, then fall off the old leaves. On average, 4-6% of the plants die each year, with more than 10% in severe years, the losses can not be underestimated.