- Peronospora, genus Peronospora - genus of destructive downy mildews
--1 is a kind of fungus genus
--1 is a member of Peronosporaceae, family Peronosporaceae
--1 has members:blue mold fungus, Peronospora tabacina; onion mildew, Peronospora destructor; tobacco mildew, Peronospora hyoscyami