40%嘧霉胺悬浮剂防治黄瓜灰霉病田间药效试验报告
Agriculture of Henan（2007）
Abstract
<正>黄瓜灰霉病主要发生在塑料棚和温室栽培生产中,为害花和幼瓜。叶片一般由脱落的烂花或病卷须附着叶面引起发病,形成直径20-50毫米大型病斑,近圆形或不规则形,边缘明显,表面密生霉层。烂瓜或烂花附着在茎上时,能引起茎部的腐烂,严重时下部的节腐烂致蔓折断,致使植株枯死。该病原系
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