Peronospora alsinearum Caspary, 1855

on Stellaria

Stellaria media, Belgium, prov. Antwerp, Westerlo, Rothoek, 4.iv.201i9 © Carina Van Steenwinkel

leaf with down

conidiopores

conidia

conidium

Stellaria media, Hungary, Budapest, 16.iii.2019 © László Érsek

diseased plant

detail

down

maximally enlarged

gall

leaves pale, may be disfigured. Underside with a yellowish to brownish purple down, consisting of 0.5 mm high erect conidiophores that apically several times are dichotomously branching, each branch ending upon a conidium.

host plants

Caryophyllaceae, narrowly monophagous

Stellaria media, neglecta, nemorum, pallida.

synonyms

Peronospora media Gäumann, 1920.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Blumer (1946a), Brandenburger (1985a: 102), Buhr (1965a), Chater, Woods, Stringer, ao (2020a), Cunnington (2008a), Dauphin & Aniotsbehere (1997a), Doppelbaur & Doppelbaur (1973a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Lee, Shin, Lee & Choi (2017a), Müller (2015a), Negrean, Constantinescu & Denchev (2004a), Redfern & Shirley (2011a), Riethmüller, Voglmayr, Göker ao (2002a), Săvulescu (1948a), Thines, Telle, Ploch & Runge (2009b), Voglmayr (2003a).