睡莲烂叶病如何防治?
【症状】常见危害立叶,发病初期,睡莲的叶面出现褪绿斑点,周围组织坏死,以后扩大成不规则病斑,淡褐色至深褐色。浮叶上呈暗色至深灰色,具不明显轮纹大斑,散生黑色小点,引起叶缘枯死。发病后期,病斑上散生着许多黑色的小点粒,即病原菌的分生孢子器。
【病原与发病规律】病原为喜温叶点霉,属半知菌亚门、叶点霉属。分生孢子器近球形或扁球形,褐色。病菌以分生孢子器在病落叶上越冬。分生孢子借风雨传播,从伤口人侵或直接入侵。高温高湿利于睡莲发病。5~9月为发病期。10月以后病菌在病残叶上形成分生孢子器越冬,成为翌年初次侵染源。睡莲开花前至开花初发病较轻,开花后期至结实期病害发展迅速。缸栽较池栽荷花病重,小缸栽种的病害较重。高温高湿和多雨季节有利于病害蔓延。睡莲病害发生的早晚和严重程度主要和气温及空气相对湿度有关。
【防治方法】①种植睡莲抗病新品种。②零星发病时,可及时摘除病叶避免扩散危害。③提倡施用酵素菌沤制的堆肥。④发病初期喷洒36%甲基硫菌灵悬浮剂500倍液,或75%达科宁可湿性粉剂1000倍液加50%多菌灵可湿性粉剂1000倍液,或27%高脂膜200倍液加70%代森锰锌可湿性粉剂800~1000倍液,或1:1:100等量式波尔多液,或27%铜高尚悬浮剂600倍液。
更多阅读
- Avec specification, la haine en tenant matching, ou matchmaking, permet a un site pour bagarre
- Bitcoin Black-jack No £1 minimum deposit casino uk deposit Incentive Codes
- Casino 7€ bonus casino Spiele Liste 2024
- However failed to end up shifting in it, and neither performed he
- Appart Auberge Mien 50 tours gratuits tomb raider sur l'inscription sans dépôt Acquiescement Blagues Repère
- Although it is unfortunate and difficult for people so you can view, this might be good news to own Jackie and you may Trace
- A intenzione di baratro: agli uomini piace approdare in intricato, magro alla cavita
- Matchmaking Finnish feminine, never suppose its vibe since their thinking is genuine and you can transparent
- Online Casino Bonus greenplay casino Angebote As part of Brd
- Examining the Charm and you will Attraction out-of Chilean Brides
- Nitrospins Gambling enterprise No deposit Incentive
- Finest On the internet A real income Gambling enterprises To have 2022
- Internet dating achievement, spouse well worth discrepancy and you may unfaithfulness
- 喜阴不喜阳的开花植物(喜阴不喜阳的开花植物有哪些)
- Los Excelentes Juegos De Tragamonedas 3d Del 2024
- A great Gambling enterprises
- 各种养花技巧(养花知识大全与技巧视频)
- A real income Internet casino
- Controlling Modern and Traditional Areas in Oriental Relationships
- 全部花的图片(好看的花图片大全)
网站邮箱:uuzw7@hotmail.com