Peronospora symphyti Gäumann, 1923

on Symphytum

Peronospora symphyti on Symphytum officinale

Symphytum officinale, Belgium, prov. Flemish Brabant, Averbode, Vierkensbroek, 30.x.2022 © Carina Van Steenwinkel

Peronospora symphyti on Symphytum officinale

same leaf, underside

Peronospora symphyti on Symphytum officinale

conidiophore

Peronospora symphyti on Symphytum officinale

ultimate branchings

Peronospora symphyti on Symphytum officinale

conidia 20-25 x 21-27 µm

gall

Underside of the leaves with a
a brown fungal cover of 0.3-1.2 mm high erect conidiophores that apically several times are branching, each branch ending upon a globular conidium.

host plants

Boraginaceae, monophagous

Symphytum officinale, tuberosum.

references

Brandenburger (1985a: 524), Chater, Woods, Stringer, ao (2020a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Gustavsson (1991a), Hafellner (1980a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Müller & Kokeš (2008a), Negrean (1995a), Săvulescu (1948a), Scheuer & Bechter (2012a).