Erysiphe polygoni
DC.
KW [Darwin] 12295. Place of collection: Ukraine; Volynska Oblast; Stara Vyzhivka District; Borzova village (N51°26' E24°27'). Date of collection: 7 September 1984. Associated organism: Rumex acetosella (leaf, petiole). Collector: Heluta, V.P.. Identifier: Heluta, V.P..