Plant Parasites of Europe

leafminers, galls and fungi

Urocystis agropyri

Urocystis agropyri (Preuss) Fischer von Waldheim, 1867

on Elymus, Elytrigia

Urocystis agropyri on Elytrigia repens

Elytrigia repens, Belgium, prov. Limbourg, Kinrooi, Stamprooierbroek, de Zig, 18.v.2021 © Carina Van Steenwinkel: infected plant

Urocystis agropyri on Elytrigia repens

leaves with sori

Urocystis agropyri on Elytrigia repens

freshly opened sori, and a somewhat older one: blackish brown and brown

Urocystis agropyri on Elytrigia repens

opened sorus between two still closed ones

Urocystis agropyri : spore balls

spore balls

Urocystis agropyri : spore balls



Elongate narrow blisters between the nerves of the leaf. The brownish black spore balls that are released here consist of 1-2(4) spores, wrapped in a layer of smaller sterile, pale yellow cells.

host plants

Poaceae, narrowly monophagous

Agropyron cristatum; Elymus alaskanus subsp. scandicus, caninus; Elytrigia atherica, intermedia, juncea, repens; Leymus arenarius; Psathyrostachys juncea

Buhr adds Briza; this is not plausible; that also applies to a reference to Vulpia alopecuros by Almaraz.


Urocystis agropyri-juncei (Viennot-Bourgin) Zogg, 1986


Ainsworth & Sampson (1950a), Almaraz (1998a), Brandenburger (1985a: 780), Buhr (1964b), Denchev & Denchev (2016a), Denchev, Knudsen & Denchev (2020a), Dietrich (2013a, 2016b), Klenke (2002a), Klenke & Scholler (2015a), Kruse (2014a, 2019a), Lotze-Engelhard (2010a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Redfern & Shirley (2011a), Savchenko & Heluta (2012a), Scholz & Scholz (2013a), Vanderweyen & Fraiture (2014a), Vánky (1994a), Vánky & Abbasi (2013a), Woods, Chater, Smith ao (2018a).

Last modified 6.iv.2023