Oidium quercinum Thüm.

Selection criteria. Country: South Africa. Associated organism: any (distribution map)

Number of records. 21. Locations. Gauteng, KwaZulu Natal, Western Cape, state not noted. Associated organism. Quercus sp. Collections. PREM 13021, 17084, 21242, 33349, 33349, van der Byl 2104, van der Byl 58. Literature. Doidge (1950) page(s) 671; Hopkins (1938) page(s) 100; Hopkins (1939) page(s) 40; Nel (1942) page(s) 14, 101, 161.