Erysiphe polygoni
DC.
KW [Darwin] 53372. Place of collection: Ukraine; Volynska Oblast; Ratne District; Pidgir‘ya village (N51°47' E24°46'). Date of collection: 5 August 1998. Associated organism: Polygonum aviculare (leaf). Collector: Heluta, V.P.. Identifier: Heluta, V.P..