Plant Parasites of Europe

leafminers, galls and fungi

Urocystis violae

Urocystis violae (Sowerby) Fischer von Waldheim, 1867

on Viola

Urocystis violae gall on Viola spec.

Viola spec., Albanië, prov. Shkodër, Theth, vii.2017 © Cor Zonneveld


the petioles, also other parts of the plant, disfigured by up to several cm long blisters that contain a blackish-brown mass of spore balls. The spore balls consist of 3-20 spores, wrapped in a continuous layer of yellowish sterile cells.

host plants

Violaceae, monophagous

Viola alba, alba x hirta, ambigua, biflora, canina, collina, cornuta, elatior x pumila, hirta, hirta x suavis, lutea, mirabilis, odorata, pumila, reichenbachiana, riviniana, stagnina, suavis.


Ainsworth & Sampson (1950a), Almaraz (1998a), Buhr (1965a), Chinery (2011a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Klenke & Scholler (2015a), Lutz & Vánky (2009a), Redfern & Shirley (2011a), Roskam (2009a), Savchenko & Heluta (2012a), Tomasi (2014a), Vanderweyen & Fraiture (2014a), Vánky (1994a), Vánky & Abbasi (2013a).

Last modified 20.vii.2019