DOWNY mildew or blue mould of tobacco caused by Peronospora tabacina Adam. is destructive in the American and Australian regions and has now been reported for the first time in Europe1. It survives in association with over-wintering or over-summering host plants of which infected N. tabacum is of major importance2,3. Such plants produce conidia that are airborne and can establish infection in distant areas2.

中文翻译：

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Peronospora tabacina Adam 中的孢子释放。

烟草霜霉病或烟草青霉病引起的烟草霜霉病。在美国和澳大利亚地区具有破坏性，现已在欧洲首次报道。它与越冬或越夏寄主植物一起存活，其中受感染的烟草是非常重要的 2,3。这些植物产生的分生孢子可以通过空气传播，并可以在遥远的地区建立感染2。