广东万年青的病虫害及其防治

植物图片 2021-03-30 08:15

广东万年青在养殖的过程中，容易遭受病虫害，像是叶斑病和炭疽病，虫害主要就是介壳虫。应该怎么防治呢？

广东万年青的病害

叶斑病

叶斑病是广东万年青常见的病害，一般在多雨的季节比较容易发生叶斑病。

当广东万年青出现叶斑病的时候，会在叶片上长出病斑，并逐渐扩大，病斑的周边颜色会变淡，在叶斑病的后期，病害会更加的严重，变为黑褐色。

如果广东万年青发生了叶斑病，需要及时的清除病变的叶片，在病情比较严重的时候，可以用50%的多菌灵的1000倍液进行喷洒治疗。

炭疽病

炭疽病也是广东万年青常见的病害，主要发生在叶片上，严重的时候可以发展到叶片上，使植株出现水渍状的病斑，严重的时候，病斑会变成一片，并出现黑点。

炭疽病的发生主要是通风不良导致的，所以在养护期间需要加强通风，并要防治介壳虫。在发病的初期可以喷洒60%的代森锌800倍液，或者70%的托布津的1500倍液进行防治。

广东万年青的虫害

褐软蚧

褐软蚧对广东万年青的危害较大，一般褐软蚧会群集在广东万年青的叶片上，吸食植株的汁液，并会排出粘液引起病菌的大量繁殖，导致茎叶变黑，植株生长不良，叶子变黄。在比较严重的时候，植株上会布满害虫。

一般在褐软蚧发生的初期，害虫比较少，可以直接将害虫刮除，但是在若虫孵化之后，就需要喷药杀虫了，一般可以用40%的乐果乳油的1000倍液或者40%的氧化乐果乳油的1000倍液进行喷杀。

专题： 万年青
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