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花卉植物病害:菊花花叶病毒病

Miss Chen
2017-09-13
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#菊花花叶病毒病
分布与危害

病毒病是菊花上的重要病害,各种植区普遍发生,危害严重。

症状

菊花染病后抗病品种表现为轻型花叶或不显症,在感病品种上,可形成明显的花叶症状或坏死斑,严重的产生褐色枯斑。

病原

Chrysanthemum virus B称菊花B病毒,属病毒。病毒粒体线条状,长690×12(μm),致死温度60-65℃,体外存活期1-6天,稀释限点100-1000倍,系统侵染的植物有菊、野菊、瓜叶菊、花环菊等。

发生规律

菊花B病毒由汁液、扦插条传播,传毒煤介主要有桃蚜(Myzuspersicae)、马铃薯蚜(Macrosiphumeu phorbiae)及其他多种蚜虫进行非持久性传毒。

防治方法

(1)严格执行检疫,防止人为传播。

(2)脱毒处理。

从无病株上采条作繁殖材料。有条件的采用茎尖组织培养进行脱毒,带毒的盆栽菊花可置于36℃条件下处理21-28天,能脱毒。生产上经过热处理的菊花,病毒已被钝化,可用来做繁殖材料。

(3)药剂防治。

①防治传毒蚜虫,喷洒50%抗蚜威可湿性粉剂2000倍液。

②用针对性的治病毒病的药对症治疗,如宁南霉素、吗啉胍、盐酸吗啉胍、吗啉胍乙酸铜、氨基酸寡糖素等。
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