密花石斛的病虫防治

植物图片 2021-03-14 17:14

你可能对这一类的植物都不太熟悉，不过，如果你观察一下它的图片的话，就会发现它的花朵多么繁密，串串小花吊在枝头，甚是好看。不过，如果这么好看的植物被病虫害威胁的话，它的美丽就不复存在了。所以，我们一定要采取措施避免这种情况的出现。那么，具体应该怎么做呢？

常见的病虫害种类

这种植物常见的病害大概有以下两种。第一个是黑斑病，在夏季初期比较常见，我们从名字上也可以看出它能导致植物的叶子上出现深黑的小点，严重时许多黑点会连成一块，最终会导致叶片枯萎掉落。第二个是炭疽病，在一月份到五月份都可能发生，遭受这种病害的叶子会出现黑色或是褐色的斑点，与第一种病有点类似，不过仔细观察还是有差异的。

虫害主要是一种叫做“菲盾蚧”的虫子。这种害虫会寄生在植物叶子的背面或者是边缘，接下来它们会慢慢地吸取叶片中的汁液，长久下去会致使叶子慢慢变枯黄或者掉落，更甚者会引起整个植物的死亡，实在不能不加以重视。这种害虫主要在五月末期比较常见，因为这时候是它繁殖孵化的旺盛时期。

防治方法

对于第一种病害，我们一般会采用波尔多液（比例1:1:150）进行预防和控制。当然，多灵一千倍药液也是可以使用的。

针对第二种病，我们使用的是多菌灵一千倍药液（浓度百分之五十）或者甲基托布津一千倍药液喷雾（浓度百分之五十）进行喷雾，二到三次就可以了。

要对付害虫，要视情况而定。如果数量比较少，可以采用剪掉病枝老枝并且集中烧毁的办法进行防治。不过，一旦数量比较多的话，就必须要用药剂了。

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