Erysiphe polygoni
DC.
KW [Darwin] 11497. Place of collection: Ukraine; Donetsk Oblast; Sloviansk District; Mayaki village (N48°57' E37°37'). Date of collection: 24 July 1977. Associated organism: Polygonum aviculare (leaf). Collector: Heluta, V.P.. Identifier: Heluta, V.P..