Peronospora violae de Bary, 1863

on Viola

gall

leaves pale, may be disfigured. Underside with a greyish-violet down, consisting of 0.5 mm high erect conidiophores that apically several times are dichotomously branching, each terminal branch ending in a conidium.

hostplants

Violaceae, monophagous

Viola arvensis, biflora, calcarata, cornuta, riviniana, tricolor, x wittrockiana.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Blumer (1946a), Brandenburger (1985a), Buhr (1965a), Cunnington (2008a), Dauphin & Aniotsbehere (1997a), Doppelbaur & Doppelbaur (1974a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Kozłowska, Bacigálová ao (2014a), Negrean (1995a), Redfern & Shirley (2011a), Săvulescu (1948a), Voglmayr (2003a).