Peronospora verbasci Gäumann, 1923
on Verbascum
gall
development of the plant disturbed; upperside of the lef with yellow spots. Underside there with abrownish purple fungal cover of 0.8 mm high erect conidiophores that apically several times are branching, each terminal branch ending in a conidium.
hostplants
Scrophulariaceae, monophagous
Verbascum blattaria, chaixii subsp. austriacum, densiflorum, lychnitis, nigrum, phlomoides, speciosum, thapsus & subsp. montanum
references
Brandenburger (1985a), Doppelbaur, Huber & Poelt (1965a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Müller (2015a), Müller & Kokeš (2008a), Săvulescu (1948a).