Peronospora jaapiana Magnus, 1910

on Rheum

gall

underside of the leaves with a greyish brown to brownish purple fungal down, consisting of erect, distally repeatedly dichotomously branched conidiophores. The conidia are elliptic.

hostplants

Polygonaceae, monophagous

Rheum palmatum, rhaponticum.

references

Brandenburger (1985a: 88), Cunnington (2008a), Klenke & Scholler (2015a), Mułenko, Piątek, Wołczańska ao (2010a).

05/04/2017

mod 24.vii.2017