Erysiphe vanbruntiana (Gerard) Braun & Takamatsu, 2000

Fungi, Ascomycota, Leotiomycetes, Erysiphales, Erysiphaceae

on Sambucus

Erysiphe vanbruntiana on Sambucus nigra

Sambucus spec., Belgium, prov. Limburg, Bree, de Luysen, Mariahof © Carina Van Steenwinkel

Erysiphe vanbruntiana: cleistothecia

underside with cleistotecia

Erysiphe vanbruntiana: cleistothecium

cleistothecium

Erysiphe vanbruntiana: cleistothecia

cleistothecium

Erysiphe vanbruntiana: ascus

an isolated ascus (but with exceptionally few spores)

gall

mycelium amphigous, thin, cobweb-like. Appressoria lobed, solitary or paired. Conidia formed one by one, without fibrosin bodies, elliptic. Foot-cell of conidiophore cylindric, 18-45 µm. Cleistothecia with 3-8 asci, containing 3-6 spores. Appendages 15-25, equatorial, 1-1.5 the diameter; they are stiff, unbranched, hyaline, mostly aseptate; the apices are 3-6 times forked in quick succession.

hostplants

Adoxaceae, monophagous

Sambucus nigra, racemosa, sibirica, x strumpfii.

The common Sambucus nigra is only rarely affected.

notes

Originally a species of East Asia, currently strongly expanding in Europe. This concerns the var. sambuci-racemosae Braun & Takamatsu, 2000. The typical, North American – East Asiatic form has a lower number of appendages, viz., 15-18.

synonyms

Microsphaera vanbruntiana Gerard, 1875.

references

Bacigálová & Marková (2006a), Beenken & Senn-Irlet (2016a), Braun (1995a), Braun & Cook (2012a) Bresinsky (2016a), Czerniawska, Madej, Adamska ao (2000a), Dynowska, Fiedorowicz & Kubiak (1999a), Fraiture & Vanderweyen (2009a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Mułenko, Piątek, Wołczańska ao (2010a), Mułenko, Sałata & Wołczańska (1995a), Negrean & Anastasiu (2006a), Ruszkiewicz-Michalska (2006a), Sucharzewska, Dynowska, Kubiak ao (2012b), Świderska, Wołczańska, Kozłowska ao (2005a), Talgø, Sundheim, Gjærum, Herrero, Suthaparan, Topp & Stensvand (2010a).

19/04/2017

pub 27.v.2017 · mod 17.vii.2017