Plant Parasites of Europe

leafminers, galls and fungi

Ustilago grandis

Ustilago grandis Fries, 1832

reed smut

on Phragmites

Ustilago grandis on Phragmites australis

Phragmites australis, France, dép. Moselle, Étang de Lindre, 11.v.2018 © Stéphane Claerebout

Ustilago grandis on Phragmites australis

spore mass


Dark brown sori on the stems, sometimes covering the entire stem from one internodium to the other (then resembling a slender Typha inflorescence, writes Buhr). Initially covered by the epidermis of the host plant. Spores 7-10 x 8-11 μ; they are finely echinulate, but that is not visible with the light microscope.

host plants

Poaceae, monophagous

Phragmites australis.


Ainsworth & Sampson (1950a), Almaraz (1998a), Brandenburger (198ta: 821) , Buhr (1965a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Klenke & Scholler (2015a), Kruse, Thiel, Beenken ao (2018d), Redfern & Shirley (2011a), Riegler-Hager (2005a), Roskam (2009a), Savchenko & Heluta (2012a), Scholler & Schubert (1993a), Van Ryckegem (2005a), Vanderweyen & Fraiture (2014a), Tomasi (2014a), Woods, Chater, Smith ao (2018a).

Last modified 13.xii.2022