Plasmopara wilsonii Voglmayr, Fatehi & Constantinescu, 2006
on Erodium, Geranium
Geranium molle, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel
same leaf, underside
the down is white (the conidia are colourless)
conidiophores
terminal branches of conidiophores with swollen apex
conidia with a low papilla
gall
sharply delimited upper surface leaf spots, initially some mm large, ultimately often filling the entire leaf; pale yellowish at first, in the end violoaceous brown. Underside with a greyish white felty down, consisting of conidiophores. These are 0.2 to almost 0.5 mm high, very even in thickness; the ultimate branches are swollen at the very tip. Voglmayr, Fatehi & Constantinescu (2006a) present a detailed description.
host plants
Geraniaceae, oligophagous
Geranium molle, phaeum.
Found by Kruse ao in Germany on G. phaeum. The species was described from North America, and there it was recorded from, among other species, Geranium molle and Erodium cicutarium.
references
Jage, Klenke, Kruse ao (2017a), Kruse, Thiel, Brodtbeck ao (2017a), Kruse, Thines & Choi (2016a), Voglmayr, Fatehi & Constantinescu (2006a).