Plant Parasites of Europe

leafminers, galls and fungi

Thedgonia bellocensis

Thedgonia bellocensis (Massalongo & Saccardo) Braun, 1992

on Verbascum

Thedgonia bellocensis leaf spot on Verbascum spec.

Verbascum spec., Belgium, prov. Antwerp, Mol, Leeuwerikenheide, 2.iv.2021 © Carina Van Steenwinkel: leaf spot, under the dense indumentum of the leaf upper side; not the spot’s purple edge.

Thedgonia bellocensis leaf spot on Verbascum spec.

leaf spot, lighted from behind

Thedgonia bellocensis collony

colony, and a leaf trichome

Thedgonia bellocensis conidia chain


Thedgonia bellocensis conidia chain

conidia chain


Colonies on necrotic, purple-edged leaf spots, both at the upper and the lowers sides of the leaves. Conidia up to 200 µm long, very variable in length, in chains.

host plants

Scrophulariaceae, monophagous

Verbascum densiflorum, lychnitis, nigrum, thapsus.

distribution within Europe

PESI (2021).


Septocylindrium bellocense Massalongo & Saccardo, 1908.


Ellis & Ellis (1997a), Kruse & Braun (2021a), Ruszkiewicz-Michalska (2006a).

Last modified 6.iv.2021