Plant Parasites of Europe

leafminers, galls and fungi

Urocystis johansonii

Urocystis johansonii (Lagerheim) Magnus, 1896

on Juncus


the basal part of the lower leaves is swollen into a lead-coloured globule; when this ruptures a powdery black mass of spore balls is released.

host plants

Juncaeae, narrowly monophagous

Juncus bufonius, pygmaeus.


Almaraz (1998a), Brandenburger (1985a: 745), Buhr (1964b), Denchev & Denchev (2016a), Klenke & Scholler (2015a), Tomasi (2014a), Vánky (1994a).

Last modified 21.iii.2023