甜瓜蔓枯病的发生及防治

• 作 者: 马依努尔·吾守尔
• 机 构: 阿图什市格达良乡农技推广站,
• 出 处: 农村科技
• 发表日期: 2009年08期
• 关键词: 甜瓜 蔓枯病 分生孢子器 空气湿度 褐色 病害症状 不规则 水浸 生乳 色斑 茎蔓 茎节 坏死 病菌 表面

一、病害症状茎蔓受害多在茎节处形成水浸状深绿色斑,以后变成灰白至浅红褐色不规则坏死斑,空气湿度高时,迅速扩展造成茎折或死秧。在田间,病部常产生乳白至红褐色流胶,病斑表面形成许多小黑点,即病菌的分生孢子器。叶柄染病,呈水浸状腐烂,后期亦产生许多小黑点,干缩萎垂至枯死。有时病菌沿

First, the symptoms of the disease stems and vine victims in the formation of many parts of the cauline-shaped deep green spots, after becoming pale to light reddish brown irregular necrotic spots, air humidity is high, rapid expansion caused stem stalk or dead seedlings. In the field, the disease often produce milky to reddish brown gel, the lesion surface to form many small black spots, that is, bacteria conidia. Petiole disease, was flooding-like decay, the latter also has many small black spots, dry shrinkage withered to death. Bacteria sometimes along