Peronospora rubi Rabenhorst, 1886

on Rubus

Peronospora rubi on Rubus spec.

Rubus spec., Belgium, prov. Antwerp, West Meerbeek, Hof ter Borcht, 11.viii.2021 © Carina van Steenwinkel

Peronospora rubi on Rubus spec.

advanced infection

Peronospora rubi on Rubus spec.

down

Peronospora rubi on Rubus spec.

conidiophore

Peronospora rubi on Rubus spec.

ultimate branchings

Peronospora rubi on Rubus spec.

foot of the conidiophore

Peronospora rubi on Rubus spec.

conidia

gall

underside of the leaves with a greyish fungal down of erect conidiophores that apically several times are dichotomously branching, each branch ending upon a conidium. Embedded in the host tissue lie brown, thick-walled, smooth oospores. Upper side of the leaves with yellow, angular leaf spots.

host plants

Rosaceae, monophagous

Rubus caesius, fruticosus, gracilis, idaeus, laciniatus, plicatus.

synonyms

Some authors, and also the Index Fungorum (2021), consider P. rubi a synonym of Peronospora sparsa.

references

Brandenburger (1985a), Chater, Woods, Stringer, ao (2020a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Kruse, Thiel, Beenken ao (2018d), Müller & Kokeš (2008a).