Erysiphe knautiae Duby, 1830

on Caprifoliaceae

Erysiphe knautiae on Knautia arvensis

Knautia arvensis, Belgium, prov. Limbourg, Maasmechelen, Maaswinkel, 4.vii.2019 © Carina Van Steenwinkel

Erysiphe knautiae on Knautia arvensis

Mycelia observed only epihpyllous

Erysiphe knautiae: appressorium

appressorium

Erysiphe knautiae: conidiophore

conidiophore

Erysiphe knautiae: conidia

conidia

Erysiphe knautiae: conidia

conidia

Erysiphe knautiae: conidia

germinating conidium

gall

mycelium amphigenous. Conidia solitary, elliptic, without fibrosin bodies. Foot-cell of conidiophore straight. Cleistothecia rare, with 3-6 asci, that contain 3-5 spores. Appendages 5-15, sub-equatorial, 1-4 x the diameter; they are mycelioid, septate, brown, flaccid, unbranched.

host plants

Caprifoliaceae, oligophagous

Cephalaria alpina, balkharica, transsylvanica, uralensis; Dipsacus chinensis, fullonum, laciniatus, pilosus; Knautia arvensis, dipsacifolia, drymeia, godetii, integrifolia, longifolia, macedonica, nevadensis, subcanescens, tatarica; Lomelosia argentea, caucasica, crenata, palaestina, stellata; Morina longifolia, kokanica, persica; Scabiosa atropurpurea, columbaria, corsica, crinita, japonica, lucida, ochroleuca; Sixalix semipapposa; Succisa pratensis; Succisella inflexa.

references

Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Dietrich (2013a), Dynowska, Fiedorowicz & Kubiak (1999a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1996a), Negrean & Denchev (2004a), Ruszkiewicz-Michalska (2006a).

mod 30.vii.2019