防治葡萄霜霉病

• 作 者: 夏英三
• 出 处: 新农业
• 发表日期: 1995年06期
• 关键词: 葡萄霜霉病 黄褐色斑 果梗 乙磷铝 副梢 冬季清园 病叶 病残体 通风透光条件 药剂防治

防治葡萄霜霉病葡萄一般在７月份开始发生霜霉病，８－９月份盛行。主要危害叶片，也能侵害嫩梢、花和幼果等柔嫩部位。叶片初为淡黄色水渍状斑点，渐为褐色合并成大斑，背面产生白色霜状霉层，重时落叶。嫩梢、叶柄、果梗发病为黄褐色斑，密生白色霉层。花及幼果受害，病...

Prevention and control of grape downy mildew generally downy mildew occurred in July, August-September prevalence. The main hazard leaves, but also against the tender shoots, flowers and young fruit and other soft parts. Leaf early pale yellow water-like spots, gradually brown merged into big spots, the back of white cream-like mildew, heavy deciduous. Tender shoots, petioles, fruit stems incidence of brown spots, dense white mold layer. Flowers and young fruit victims, sick ...