Peronospora septentrionalis 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 16-20 x 26-33 µm.

hostplants

Caryophyllaceae, narrowly monofaag

Cerastium cerastioides.

references

Brandenburger (1985a: 99), Buhr (1964b), Klenke & Scholler (2015a), Mułenko, Kozłowska, Bacigálová ao (2014a).

mod 23.viii.2017