Geranium pusillum, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel

infected leaf, underside

conidiophore with conidia

gall

upperside of the leaves with paled, slightly embossed patches; at the underside a brownish purple fungal down, consisting of erect, distally dichotomously branched conidiophores. The ± globular conidia sit on relatively long stalks.

host plants

Geraniaceae, monofaag

Geranium columbinum, dissectum, lucidum, molle, phaeum, purpureum, pusillum, pyrenaicum, robertianum, tuberosum.

Negrean, Constantinescu & Denchev additionally list as a hostplant, Erodium ciconium; this possibly means that they consider P. conglomerata and Peronospora erodii synonymous.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Doppelbaur & Doppelbaur (1974a), Doppelbaur, Huber & Poelt (1965a), Ellis & Ellis (1997a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Göker, Voglmayr, Riethmüller ao (2003a), Gustavsson (1959a, 1991a), Hafellner (1980a), Jage, Klenke, Kruse ao (2016a, 2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Kruse, Thiel, Beenken ao (2018d), Kruse, Thines & Choi (2016a), Melzer, Pittoni, Poelt & Scheuer (1984a), Müller (2015a), Müller & Kokeš (2008a), Negrean, Constantinescu & Denchev (2004a), Negrean & Denchev (2000a), Riethmüller, Voglmayr ao (2002a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Săvulescu (1948a), Thines, Telle, Ploch & Runge (2009b), Tomasi (2014a), Voglmayr (2003a).