Plant Parasites of Europe

leafminers, galls and fungi

Peronospora polygoni

Peronospora polygoni Halsted, 1919

on Bistorta, Persicaria, Polygonum

Peronospora polygoni on Polygonum aviculare

Polygonum aviculare, Belgium, prov. Antwerp, Mol, Heidenhuizen © Carina Van Steenwinkel

Peronospora polygoni on Polygonum aviculare

infected leaf, upperside; here down also on the upperside of the leaf!

Peronospora polygoni on Polygonum aviculare

same leaf, underside

Peronospora polygoni: conidiophore


Peronospora polygoni: conidia



leaves diffusely yellowed. Their underside with a grey down, consisting of erect conidiophores that apically several times are dichotomously branching, each branch ending in a oval conidium.

host plants

Polygonaceae, narrowly oligophagous

Bistorta officinalis, vivipara; Persicaria dubia; Polygonum aviculare.


Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985a: 84), Chater, Woods, Stringer, ao (2020a), Cunnington (2008a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Gustavsson (1959a, 1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2014a), Müller & Kokeš (2008a), Săvulescu (1948a), Thines, Telle, Ploch & Runge (2009b), Voglmayr (2003a).

Last modified 6.x.2021