Geranium spec., Zaandam, heemtuin; light infestation, upperside

same leaf, underside

conidiophores and conidia

Geranium pratense, Nieuwendam

detail of the down

conidiophores

basal part

conidium

gall

leaves with angular, brown spots; at the underside a white fungal down of erectm relatively shorty (up to 140 µm high) conidiophores that apically bear a few short branches, each one ending upon a oblong conidium with a low papilla. Voglmayr, Fatehi & Constantinescu (2006a) give a detailed description.

host plants

Geraniaceae, nauw monophagous

Geranium pratense.

Occasionally also G. ashpodeloides, dahuricum, sibiricum, tuberosum; not on G. phaeum.

synonyms

Plasmopara geranii-pratensis Săvulescu & Săvulescu, 1951.

references

Blumer (1946a), Brandenburger (1985a), Chater, Woods, Stringer, ao (2020a), Constantinescu & Denchev (2004a), Doppelbaur & Doppelbaur & Doppelbaur (1973a), Doppelbaur, Huber & Poelt (1965a), Duarte, Choi, Soares & Barreto (2014a), García-Blázquez, Constantinescu, Tellería &a Martín (2007a), Göker, Voglmayr, Riethmüller, Weiß & Oberwinkler (2003a), Hafellner (1980a), Jage, Klenke, Kruse ao (2017a), Kirbağ (2004a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Kruse, Thines & Choi (2016a), Ludwig (1974a), Mayor (1967a), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Bacigálová, Wołczańska ao (2008a), Mułenko, Kozłowska, Bacigálová ao (2014a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1995a), Riethmüller, Voglmayr, Göker ao (2002a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Voglmayr, Fatehi & Constantinescu (2006a).