Peronospora rubi Rabenhorst, 1886
Rubus spec., Belgium, prov. Antwerp, West Meerbeek, Hof ter Borcht, 11.viii.2021 © Carina van Steenwinkel
foot of the conidiophore
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.
Rubus caesius, fruticosus, gracilis, idaeus, laciniatus, plicatus.
Some authors, and also the Index Fungorum (2021), consider P. rubi a synonym of Peronospora sparsa.
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).