Oidium (genus)

Oidium
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Ascomycetes
Order:	Erysiphales
Genus:	Oidium

Oidium is a genus of Deuteromycetes, where traditionally most anamorphs of the order Erysiphales are included. Most of them are plant pathogens causing different forms of powdery mildew for example:

• Oidium begoniae (=O.cyclaminis, O.lini, O.violae) = Erysiphe polyphaga
• Oidium caricae (on papayas)
• Oidium caricae-papayae (on papayas)
• Oidium caricicola (on papayas)
• Oidium chrysanthemi = Erysiphe cichoracearum (on numerous plant species, especially Asteraceae)
• Oidium erysiphoides = Sphaerotheca fuliginea (on melons, watermelons and cucumbers)
• Oidium farinosum = Podosphaera leucotricha (on apples)
• Oidium helichrysi (on strawflowers)
• Oidium hortensiae = Microsphaera polonica (on bear's breeches and hydrangea)
• Oidium indicum (on papayas and other tropical fruits)
• Oidium lycopersicum (on tomatoes)
• Oidium monilioides = Blumeria graminis
• Oidium neolycopersici (on tomatoes)
• Oidium oxalidis (on sorrels)
• Oidium papayae (on papayas)
• Oidium quercinum = Microsphaera alphitoides (on oaks)
• Oidium tritici = Erysiphe graminis (on cereals)
• Oidium tuckeri = Uncinula necator (on grapes)

Oidium albicans has been a parallel name of the yeast Candida albicans (not related to the powdery mildews).