Peronospora vernalis Gäumann, 1923

on Spergula

gall

leaves pale, may be disfigured. Oospores are formed in the swollen flower buds. Underside with a greyish down, consisting of 0.5 mm high erect conidiophores that apically several times are dichotomously branching, each branch ending upon a conidium.

hostplants

Caryophyllaceae, narrowly monophagous

Spergula morisonii (= vernalis), pentandra.

references

Brandenburger (1985a: 97), Buhr (1965a), Doppelbaur, Huber & Poelt (1965a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a).

mod 2.ix.2018