Erysiphe polygoni
DC.
KW [Darwin] 12302. Place of collection: Ukraine; Kyiv Oblast; Obukhiv District; Pluty village (N50°10' E30°43'). Date of collection: 9 October 1973. Associated organism: Rumex acetosella (leaf, petiole). Collector: Dudka, I.O.. Identifier: Heluta, V.P..