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烟草霜霉病是一种毁灭性和具有异常的传播能力的外来危害性病害 ,在环境条件适宜的情况下 ,可以产生大流行 ,足以对烟草生产造成毁灭性损失。目前已经知道的霜霉病菌 (Ｐｅｒｏｎｏｓｐｏｒａｔａｂａｃｉｎａ)抗源是普通烟草和几个生长在澳大利亚的野生种 ,他们包括Ｎ .ｄｅｂ
Tobacco downy mildew is a devastating and aberrant transmission of exotic harmful diseases that, when conditions permit, can produce a pandemic that is sufficient to cause devastating losses to tobacco production. The known peritonitis (Peronospora tabacina) sources are Nicotiana tabacum and several wild species that grow in Australia and include N. deb