Erysiphe polygoni
DC.
KW [Darwin] 51557. Place of collection: Ukraine; Kyiv Oblast; Chornobyl’ zone; Vīl’cha settlement (N51°21' E29°26'). Date of collection: 28 July 1947. Associated organism: Polygonum aviculare (leaf). Collector: Radzīyevs’kiĭ, H.. Identifier: Heluta, V.P..