彼岸花的病虫害及防治方法

植物图片 2021-03-26 09:08

彼岸花，花叶两不相见，生生相错，花朵的艳红像是无声的哀嚎，人们大多爱它背后的故事，因此而养殖它，但在病虫防治这方面却没有经验，所以小编就来告诉你们应该怎么办。

彼岸花的病害及防治方法

细菌性软腐病

病菌为弱寄生菌，主要危害植株的块茎。

病菌从彼岸花表面的伤口侵入，在扩展过程中会分泌原果胶酶，粉蚧寄主细胞间中胶层的果胶质，植株的细胞分解，水分外渗，患病部位就会呈现软腐状，有时还会散发出恶臭。

防治方法

在栽植前用0. 3%硫酸铜液浸泡30分钟，用水洗净，晾干后种植。

每隔半月喷50%多菌灵可湿性粉剂500倍液防治。

发病初期用50%苯来特2500倍液喷洒。

彼岸花的虫害及防治方法

斜纹夜蛾

一般在春末到十一月份发病严重。

幼虫会危害植株的叶子、花蕾和果实，会咬食叶肉，咬蛀花葶、种子，导致植株生长衰弱，逐渐枯萎、死亡。

防治方法

可用5%锐劲特悬浮剂2500倍液，万灵1000倍液防治。

石蒜夜蛾

幼虫会咬食鳞茎的内部，发现受害时，往往叶片已经被掏空，受害处留下大量的绿色或者褐色粪粒。

防治方法

经常观察叶片的背面，看是否有排列整齐的虫卵，一旦发现，立刻清除。

可以在早春翻地时挖除越冬的虫卵，减少虫害的发生。

患病的时候，喷施药剂乐斯本1500倍或辛硫膦乳油800倍，选择在早晨或傍晚幼虫出来活动时喷雾，防治效果比较好。

蛴螬

是鞘翅目金龟甲总科幼虫的总称。

幼虫终生存活在土壤里，喜欢咬食刚刚播下的种子、根茎、幼苗等等，造成缺苗断垄，分布极其广泛，危害严重。

防治方法

发现后应及时采用辛硫磷或敌百虫等药物进行喷药防治。

专题： 彼岸花
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