Peronospora helvetica Gäumann, 1923

on Cerastium

gall

upperside of the leaves with paled, slightly embossed patches; at the corresponding underside a greyish fungal bloom, consisting of erect, distally strongly branched conidiophores. The conidia measure 22-25 x 30-34 µm.

hostplants

Caryophyllaceae, narrowly monofaag

Cerastium latifolium.

references

Blumer (1946a), Brandenburger (1985a: 99), Buhr (1964b), Klenke & Scholler (2015a).

25/05/2017

mod 7.viii.2017