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温室黄瓜黑星病发生面广、为害严重，近年来又有发展的趋势，故应注意加强防治。一、黑星病症状及发生条件幼苗染病，子叶上产生黄白色圆形斑，发展后致全叶干枯；茎蔓染病为水浸状暗绿色梭形斑、凹陷龟裂、湿度大时长出黑色霉层，即病菌的分生孢子梗和分生孢子；卷须染病...
Greenhouse cucumber scab has a wide range of occurrence, serious damage, in recent years there is the trend of development, it should pay attention to strengthening prevention and control. First, the black star disease symptoms and conditions Seedling disease, the cotyledons produce yellowish white round spot, the development of the whole leaf caused by dry; stalk disease is flooded dark green fusiform spot, depression cracks, when humidity is large, black Mold layer, namely germ conidiophores and conidia; tendrils infected ...