Peronospora knautiae Fuckel, 1886

on Knautia, Scabiosa

gall

leaves with amphigenous brownish-violet spots. Their underside with a greyish-white to violet down, consisting of erect conidiophores that apically several times are dichotomously branching, each branch ending upon an elliptic conidium.

host plants

Caprifoliaceae, oligophagous

Knautia arvensis, dipsacifolia, drymeia, godetii, kitaibelii, transalpina; Scabiosa columbaria, lucida, ochroleuca.

references

Blumer (1946a), Brandenburger (1985a), Constantinescu & Denchev (2004a), Cunnington (2008a), Doppelbaur & Doppelbaur (1973a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Jage, Klenke, Kruse ao (2016a, 2017a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse (2014a, 2019a), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Kozłowska, Bacigálová ao (2014a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1995a), Negrean, Constantinescu & Denchev (2004a), Ruszkiewicz-Michalska (2006a), Săvulescu (1948a), Voglmayr (2003a).