Peronospora hyoscyami f.sp. tabacina
blue mould of tobacco
Peronospora effusa var. hyoscyami, Peronospora hyoscyami, Peronospora nicotianae, Peronospora tabacina
Widespread in tobacco growing regions in the SE USA
Primarily tobacco. Reported on tomato, pepper and eggplant, but these are not considered important hosts
The role of infected seeds in disseminating the fungus remains undetermined in tobacco and seems insignificant for the spread of blue mould.
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