牡丹吊兰病虫及防治方法大全

植物图片 2021-11-07 18:12

褐斑病：先剪除长斑的叶片，然后喷洒波尔多液进行治疗。根腐病：先将植株脱盆，剪除烂根，然后把它栽入新的盆土中，慢慢养护即可。介壳虫：直接摘除成虫，再用氧化乐果药液喷洒治疗。

牡丹吊兰病害一：褐斑病

症状：

感染初期叶表面会出现若干黄绿色斑点，在逐渐变大的过程中还会形成褐色或黑色斑纹。

防治方法：

每月喷1-2次波尔多液，根据病情严重情况决定喷药的次数，非常严重时每月喷三次。另外，感染严重的病叶要剪下集中烧毁或深埋，防止感染更多的叶子。

牡丹吊兰病害二：根腐病

症状：

只侵害根部，导致根部变黑、腐烂，并且会使生长速度减慢，受侵严重时可能会使整株死亡。

防治方法：

分株栽植前要仔细检查是否有病根，若有一定要及时剪掉并烧毁才可种植，并在栽植时要撒一些硫磺粉在种植穴中。

牡丹吊兰常见虫害：吹绵介壳虫

防治方法：

1.用氧化乐果乳剂水溶液喷洒，

2.在入冬或早春时在枝干下部涂抹石硫合剂。

牡丹吊兰叶子发黄原因：

1.自然生长新陈代谢。

2.强光直射或长时间没有光照。

3.积水过多，透气性差。

4.施肥过量或过少。

牡丹吊兰不开花原因：

浇水次数过多，量过大。由于植物所需的钾肥不溶于水，而供茎叶生长的氮磷元素可溶于水，使得植物无法正常的开花坐果。

防治方法：

1.控制浇水。

2.适当光照。忌曝晒和无光。

3.粗犷管理。

专题： 吊兰
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