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