Erysiphe arcuata Braun, Heluta & Takamatsu, 2006

on Carpinus

Erysiphe arcuata: cleistothecium on Carpinus betulus

Carpinus betulus, België, prov. Antwerpen, Meerhout © Carina Van Steenwinkel: cleistothecium (epiphyllous, stained with congo red)

Erysiphe arcuata: appendage, detail

tip of an appendage

Erysiphe arcuata: ascus



mycelium amphigenous but mainly epiphyllous, sometimes causing some malformation. Conidia solitary, elliptic, without fibrosin bodies. Cleistothecia with 4-10 asci, that generally contain 5 spores. Appendages 10-20, mainly equatorial, 1.5-3 x the diameter; they are unbranched, rather stiffly curved, mostly rough, brown near the base and have there a single sept; the very tip is closely circinate.

host plants

Betulaceae, monophagous

Carpinus betulus.


Erysiphe carpinicola: Wołczańska (2007a); Oidium carpini Foitzik, 1995



Beenken & Senn-Irlet (2016a), Braun & Cook (2012a), Bresinsky (2016a), Henricot (2009a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015), Kruse (2014a, 2019a), Leysen (2013a), Mułenko, Piątek, Wołczańska ao (2010a), Scheuer & Bechter (2012a), Świderska, Wołczańska, Kozłowska ao (2005a).

mod 20.vii.2019