Golovinomyces verbasci (Jaczewski) Heluta, 1988

on Verbascum

Golovinomyces verbasci on Verbascum spec.

Verbascum spec., Belgium, prov. Limburg, Ham, Immertse Bossen © Carina Van Steenwinkel

Golovinomyces verbasci on Verbascum spec.

group of cleistothecia

Golovinomyces verbasci: young cleistothecium

young cleistothecium, unripe asci

Golovinomyces verbasci: ripe cleistothecium

cleistothecium with two-spored asci

Golovinomyces verbasciL conidiophore

Verbascum spec., Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel: conidiophore

Golovinomyces verbasci: conidia

conidia

gall

mycelium amphigenous, well developed. Appressoria nipple-shaped. Conidia short-elliptic, formed in chains, without fibrosin bodies. Foot cell of conidiophore straight, 80-160 µm long. Cleistothecia mostly gregarious, 95-140 µm, with 8-20 two-spored asci. Appendages in varying number, equatorial and sub-equatorial, shorter than the diameter; they are mycelioid, septate, mostly unbranched.

hostplants

Scrophulariaceae, monophagous

Verbascum baldaccii, banaticum, blattaria, boerhavii, bombyciferum, chaixii & subsp. austriacum + orientale, densiflorum, glabratum, gnaphalodes, lanatum, longifolium, lychnitis, x neilreichii, nigrum & subsp. abietinum, olympicum, ovalifolium, phlomoides, phoeniceum, pulverulentum, speciosum, thapsus & subsp. crassifolium, virgatum.

synonyms

Erysiphe verbasci (Jaczewski) Blumer, 1933.

references

Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Dynowska, Fiedorowicz & Kubiak (1999a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse & Jage (2014a), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a).

mod 26.viii.2018