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延胡索即元胡(Corydalis turtschaninovii forma yashusuo)生产浙江,为常用中药,以块茎入药,有补气活血、散热止痛之功效。历年来遭受霜霉病的为害,一般损失20%左右,大流行年份损失在50%以上。该病每年3月初始见,4月中、下旬为发病盛期,一直持续到5月上旬。被害叶片,叶面出现褐色小点或不规则的褐色小斑,失去翠绿色光泽,叶色黄绿,病斑边缘不明显,随病情发展,病斑加多,并不断扩大,布满全叶,叶片不易平展而向叶面卷缩。在湿度较大时病叶背面出现一层灰白色霜霉状物,即病原子实体。在适宜的温湿度条件下,病情发展很快,病斑扩大,色泽加深,最后叶片腐烂或干枯,植株死亡。
Corydalis yuan (Corydalis turtschaninovii forma yashusuo) production of Zhejiang, commonly used traditional Chinese medicine, tuber medicine, qi and blood circulation, heat and pain relief effect. Suffering from downy mildew over the years, the general loss of about 20%, the annual loss of more than 50% of the pandemic. The disease was first seen in March of each year, April, late for the peak incidence, has continued until early May. Victims of the leaves, brown spots appear brown or irregular small brown spots, loss of emerald green color, leaf color yellow green, lesion edge is not obvious, with the disease development, lesions increase, and continue to expand, full of leaves , The leaves are not easy to flat and curled leaves. When humidity is high, a layer of off-white gray downy mildew appears on diseased leaves, that is, the pathogenic atom entity. In the appropriate conditions of temperature and humidity, the disease developed rapidly, lesion expansion, color deepening, and finally leaves decay or dry, plant death.