Erysiphe polygoni
DC.
KW [Darwin] 51579. Place of collection: Ukraine; Poltava Oblast; Lubny District; Pisky village; Sula river (side) (N50°01' E33°04'). Date of collection: 18 July 1989. Associated organism: Rumex acetosa (leaf). Collector: Dudka, I.O.. Identifier: Heluta, V.P..