孔雀竹芋的叶斑病防治方法

植物图片 2021-05-03 14:46

孔雀竹芋的病虫害很少，虫害可以直接忽略，最常见的就是叶斑病，别看孔雀竹芋本身就有很多的斑点，一旦患病，叶子会失去光泽，就算是孔雀也蔫了！一起看一下孔雀竹芋叶斑病的防治方法。

孔雀竹芋的叶斑病危害

孔雀竹芋原产于热带美洲及印度洋的岛域中，是为多年生草本，叶上有深浅不同的绿色斑纹，叶背部多呈褐红色。其最大的观赏价值就在于叶片，刻印说叶斑对其是致命的。发生叶斑病时，叶片会逐渐干枯、萎缩，甚至会逐渐脱落死亡。

孔雀竹芋的叶斑病症状

孔雀竹芋叶片上本来就有白色和淡绿色的斑纹，在患叶斑病的初期，若不仔细观察是看不出什么的，但随着病菌的蔓延，叶片上会出现很多的黄褐色近圆形的病斑，这些病斑会逐渐链接在一起，外围有晕圈。后期病斑扩大，整个叶片都会发黄，枯萎。

孔雀竹芋的叶斑病发病规律

叶斑病的发生主要与环境有关，环境高温多湿，空气不流通，植株的栽种密度过大，或者盆栽中杂草、烂叶较多，或者施肥较重，氮肥较多等原因。

孔雀竹芋的叶斑病防治方法

加强栽培管理，控制温度。生长季节要充分浇水，保持盆土湿润，但不能过湿积水，否则易烂根，甚至全株死亡。虽喜于低光度或荫蔽下生长，但也不宜长期置于室内、过阴不见阳光，秋冬季节要接受阳光，以保持叶片特有光彩。冬季保持干些，过湿则易烂根或基部叶片变黄。生长期每半月施稀薄液肥1次，增强其抗病能力。

一旦发现受病叶片，立即摘除，以免感染其他的叶片。

发病初期，病初期喷洒25%咪鲜胺乳油（如国光必鲜）500-600倍液，或50%多锰锌可湿性粉剂（如国光英纳）400-600倍液。连用2-3次，间隔7-10天。

专题： 孔雀竹芋 孔雀 竹芋
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