Plant Parasites of Europe

leafminers, galls and fungi

Erysiphe urticae

Erysiphe urticae (Wallroth) Blumer, 1933

on (Pilea), Urtica

Erysiphe urticae on Urtica dioica

Urtica dioica, Belgium, prov. Antwerp, Mol, de Maat © Carina Van Steenwinkel

Erysiphe urticae: cleistothecium


Erysiphe urticae: conidiophore


Erysiphe urticae: appressoria


Erysiphe urticaeL ascua

Urtica dioica, Belgium, prov. Antwerp, Meerhout © Carina Van Steenwinkel: ascus


mycelium amphigenous, forming dense, white, persistent patches. Appressoria lobate, single or paired. Conidia formed solitary, elliptic, without fibrosin bodies. Cleistothecia 80-135 µm, with 5-10 asci, containing 2-6 spores. Appendages in variable numbers, sub-equatorial, 0.5-1.5 x the diameter. They are mycelioid, unbranched, largely hyaline, 0-4 septate.

host plants

Urticaceae, oligophagous

Urtica cannabina, dioica, kioviensis, pilulifera, urens.

Outside of Europe also Pilea glaberrima


Bahçecioğlu, Kabaktepe & Yildiz (2006a), Blumer (1946a), Brandenburger (1985a: 78), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Dynowska, Fiedorowicz & Kubiak (1999a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Leysen (217a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Scholler, Reinhard & Schubert (1996a), Scholler & Schubert (1993a), Sucharzewska, Dynowska, Kubiak ao (2012b).

Last modified 1.xii.2021