令箭荷花长干枯斑怎么办?
令箭荷花长干枯斑怎么办,盆栽的令箭荷花,在其肉质变态茎上出现干枯斑,可能是炭疽病或茎腐病所引起的。
可仔细检查其干枯斑,若其上有波状轮纹,则可以肯定是炭疽病,可先切除炭疽病斑部分,待切口收干后再喷洒农药防治。可用25%的炭特灵可湿性粉剂500倍液,或用75%的炭疽福美可湿性粉剂500倍液,或用75%的百菌清(或70%的代森锰锌)可湿性粉剂700倍液,交替使用,每隔7-15天1次。
若是茎腐病,其干枯斑边缘为黑褐色,中央呈灰色,但无波状轮纹。防治方法:先切去病斑部分,稍晾待切口收干后再喷洒50%的克菌丹可湿性粉剂800倍液,或70%的甲基托布津可湿性粉剂1000倍液进行防治,以上就是关于令箭荷花长干枯斑怎么办的介绍。
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