Peronospora rossica Gäumann, 1923

on Dracocephalum

gall

upper side of the leaf with pale spots. Underside with a brownish purple down of erect conidiophores that apically several times are dichotomously branching, each branch ending upon an egg-shaped conidium.

hostplants

Lamiaceae, monofaag

Dracocephalum ruyschiana.

references

Brandenburger (1985a), Klenke & Scholler (2015a).

25/09/2015

mod 15.viii.2017