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为什么兰花叶子上常会有黑斑点

更新时间: 2020-09-19 00:00:00     

原因举例:

1、浇水时当头淋浇,易溅起盆土沾于叶上,使叶发焦;

2、施肥时肥液沾在叶上,如不立即喷洒清水去除,会使叶子出现黑斑、发焦;

3、春夏季节如果不注意遮阳,在烈日下会使兰花叶子发黄、发焦;

4、放置在煤烟较多的环境中,兰花因受烟害而发黑斑;

5、兰花受炭疽病为害,叶子常会有黑斑点。

关键词: 为什么 兰花 叶子 常会 斑点

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