Peronospora tomentosa Fuckel, 1863

on Cerastium

Cerastium glomeratum, Germany, Niedersachsen, Göttingen, 6.iii.2023 © Gerrit Öhm

another specimen

underside of an infected leaf

gall

upperside of the leaves with paled, slightly embossed patches; at the corresponding underside a white, almost felty fungal bloom, consisting of erect, distally strongly branched conidiophores. Conidia 12-17 x 13-22 µm; oospores 33-39 µm.

host plants

Caryophyllaceae, narrowly monophagous

Cerastium glomeratum.

Records from other Cerastium species are erroneous (Klenke & Scholler).

references

Brandenburger (1985a: 99), Buhr (1964b), Chater, Woods, Stringer, ao (2020a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Müller & Kokeš (2008a), Negrean (1996a), Redfern & Shirley (2011a), Săvulescu (1948a), Tomasi (2014a).