Erysiphe polygoni
DC.
KW [Darwin] 51565. Place of collection: Ukraine; Kyiv Oblast; Chornobyl’ zone; Tovstyi Lis village (N51°23' E29°45'). Date of collection: 30 July 1947. Associated organism: Polygonum sp. (leaf). Collector: Radzīyevs’kiĭ, H.. Identifier: Heluta, V.P..