Plant Parasites of Europe

leafminers, galls and fungi

Erysiphe hedwigii

Erysiphe hedwigii (Léveillé) Braun & Takamatsu, 2000

on Viburnum

Erysiphe hedwigii mildew on Viburnum lantana

Viburnum lantana, Belgium, prov. Antwerp, Balen, de Vennen © Carina Van Steenwinkel

Erysiphe hedwigii mildew on Viburnum lantana

underside of the leaf, with large numbers of cleistothecia

Erysiphe hedwigii: cleistothecium



Mycelium amphigenous, but best developed at the underside of the leaf. Conidia solitary, elliptic, without fibrosin bodies. Cleistothecia 65-90 µm, with 2-4 asci containing 4-7 spores. Appendages 3-8, equatorial, 1-1.5 x the diameter; they are stiff, extending, brown at the base, have 0-1 basal septa, the cell wall is smooth or rough; apically they are ± 4-5 times bifurcated in quick succession.

According to Klenke & Scholler conidia are formed regularly, and the cleistothecia are amphigenous.

host plants

Adoxaceae, monophagous

Viburnum burejaeticum, carlesii, ?glomeratum, lantana, tinus.


Microsphaera hedwigii (Léveillé) Saccardo, 1882.


Not on Viburnum opulus; see Erysiphe viburni for that host plant.


Ale-Agha, Boyle, Braun ao (2008a), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Jage, Klenke & Kummer (2010a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kruse (2014a, 2019a), Kruse & Jage (2014a), Leysen (2017a), Mieslerová, Sedlářová, Michutová, ao (2020b), Ruszkiewicz-Michalska & Michalski (2005a), Sucharzewska, Dynowska, Kubiak ao (2012b), Świderska, Wołczańska, Kozłowska ao (2005a).

Last modified 1.xii.2021