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１９９５～１９９７年对新疆板蓝根真菌病害进行了初步调查，发现４种危害较严重的病害，即霜霉病、黑斑病、白粉病和白锈病，以霜霉病危害普遍而严重。病原鉴定为菘蓝霜霉菌（ＰｅｒｏｎｏｓｐｏｒａｉｓａｔｉｄｉｓＧａｕｍ）。初步研究结果表明，该菌主要以菌丝体潜伏在种子田寄主的生长点处越冬，并成为商品田板蓝根霜霉病的初次侵染源。５～８月多雨、农田小气候潮湿是诱发板蓝根霜霉病流行发生的基本要素；对板蓝根霜霉病的防治策略与措施也给予了讨论。
From 1995 to 1997, the preliminary investigation on the fungal diseases of Radix isatidis in Xinjiang was carried out. Four kinds of diseases with more serious damage, namely downy mildew, black spot, powdery mildew and white rust, were found, with the general and serious damage of downy mildew. The pathogen was identified as PeronosporaisatidisGaum. The preliminary results showed that the mycobacterium mainly lurked in the growth point of the host of seedlings and became the primary infection source of the commercial field of P. rhynchophylla. From May to August, it was rainy and humid microclimates in farmland were the basic elements that induced the epidemic of downy mildew. The prevention and cure strategies and measures of downy mildew were also discussed.