黄瓜病害目录黄瓜白粉病................................................2黄瓜霜霉病................................................3黄瓜细菌性缘枯病..........................................4黄瓜灰色疫病..............................................5黄瓜软腐病................................................6黄瓜焦边叶................................................7黄瓜(德里腐霉)猝倒病......................................8黄瓜幼苗腐霉根腐病........................................9黄瓜苗期子叶病害.........................................10黄瓜叶斑病...............................................11黄瓜红粉病...............................................12生理性萎蔫和急性凋萎.....................................13黄瓜高温障碍.............................................14黄瓜(长蠕孢)圆叶枯病.....................................15黄瓜花腐病...............................................16黄瓜低温生理病...........................................17黄瓜泡泡病...............................................18嫁接黄瓜根腐病...........................................19黄瓜起霜果和裂果.........................................20黄瓜细菌性枯萎病.........................................21黄瓜细菌性圆斑病.........................................22黄瓜缺素症...............................................23黄瓜黄化叶...............................................25黄瓜绿斑花叶病...........................................26黄瓜真滑刃线虫病.........................................27黄瓜花斑叶...............................................28黄瓜叶烧病...............................................29黄瓜氨害和亚硝酸害.......................................30黄瓜硼过剩...............................................31黄瓜褐脉叶...............................................32黄瓜花打顶...............................................33黄瓜瓜佬.................................................34黄瓜苗“载帽”...........................................35黄瓜蔓枯病...............................................36黄瓜炭疽病...............................................37黄瓜菌核病...............................................38黄瓜白粉病症状黄瓜叶片、叶柄、茎均可染病但多见于叶片。叶片染病，叶正面出现白色圆斑，渐扩大成边缘不明显的大圆斑，严重时布满整个叶片。病斑布白灰，长满白色菌丝，并有很多小黑点。黄瓜霜霉病症状该病主要为害叶片，卷须、蔓和花梗也可受害。初在叶片背面形成水渍状小点，以后病斑逐渐扩大，因受叶脉限制，呈多角形、水渍状。潮湿时，病斑上生紫黑色霉层。叶正面病斑初黄色，边缘不明显，后变黄褐色。严重时病斑连片，全叶卷缩、干村，仅留心叶。黄瓜细菌性缘枯病症状叶部发病，最初在水孔附近产生水渍状小斑点，后扩大成淡褐色不规则病斑，并沿叶脉向叶片扩大呈现V字形，病斑似水烫过。叶柄、茎卷须上的病斑也为水渍状呈褐色。瓜条从尖端开始软化。湿度大时，病部溢出大量乳白色菌脓，严重时瓜条会软化。黄瓜灰色疫病症状主要为害叶、茎和瓜条。叶片染病，产生圆形暗绿色病斑，后呈软腐状下垂。茎部染病，茎变细，发霉或呈暗绿色软腐，后期稍微开裂，病部生白色粉状霉。果实染病，果斑暗绿色圆形，呈水渍状，病部及其四周凹陷，发病早的在病部产生逐渐密集的白色霉状物或呈现紧密的污白色天鹅绒状霉，果实下部病班凹陷显著，近果梗的上半部不明显。该病除瓜条上与黄瓜疫病有这种不同之外，茎部染病与蔓枯病也近似，其特征需镜检孢子囊明确。黄瓜软腐病症状主要发生在采收后运输贮藏过程中，染病瓜先在病部产生褪绿圆斑，后渐凹陷，发软，病部渐扩大，内部软腐，表...
