属半知菌亚门，病原菌有两种，分别为杨生小球壳菌和杨小球壳菌。主要危害毛白杨及部分黑杨品系。分布于华北、西北及豫、苏等地区。
为害叶的有斑点病(Phyllosticta capsici)，早疫病(Alternaria solani)，斑枯病(Septoria lycopersici)，霜霉病等。为害枝与茎基的有菌核病(Sclerotinia sclerotiorum)。
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为害柳树嫩梢及叶部的病害有柳树褐斑病(Seporia populicola)、柳锈病(Melampsoracokosporioides)和斑枯病(Septoria salicicola)等;虫灾有柳蓝金花虫(Plagiodera versicolora)，柳青翅金花虫(Basilepta fulvipes)，杞柳跳䖬(Altica sp.
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Celery septoria blight,also called celery late blight,is a serious disease threatening celery production all over the world. It is reported that the yield losses caused by this disease can be as high as 50 %-90 %.
芹菜斑枯病又叫晚疫病,是威胁芹菜生产的一种重要病害,在世界范围内都有发生,造成的损失高达50%～90%。
参考来源 - 芹菜斑枯病研究概述·2,447,543篇论文数据，部分数据来源于NoteExpress
龙胆草覆盖遮阳网 ，斑枯病发病时间较裸地栽培晚15d，发病率为23。
Under the treatments with sun-shading net, the occurrence time of septoria leaf spot was delayed 15 days, with the rate of 23.
另由蕃茄斑萎病毒(TSWV)引起的芽枯病，主要在广东、广西等地局部流行。
Peanut bud necrosis caused by tomato spotted wilt virus (TSWV) was only found in Guangdong and Guangxi Provices.
报道了黄瓜霜霉病的前期和中后期典型症状特点，描述了多角形亮斑、多角形枯斑、疱斑形病斑、凹陷形病斑、缘枯形病斑等5种非典型症状，并分析了形成的原因。
This paper reported typical symptoms of cucumber downy mildew in early and mid-late stage, described 5 of its non-typical symptoms and analyzed the causing reasons.
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