Oidium sp.

KW [Darwin] 50939. Place of collection: Ukraine; Kiev oblast; Irpin’ district; Irpin’ town; railway station (near) (N50°31' E30°15'). Date of collection: 7 October 1979. Associated organism: Rudbeckia laciniata (leaf). Collector: Heluta, V.P.. Identifier: Heluta, V.P..