Oidium (genus)

Oidium
Spores of the Oidium anamorph of Microsphaera penicillata
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Erysiphales
Family:	Erysiphaceae
Genus:	Oidium Link (1824)
Type species
Oidium monilioides (Nees) Link (1824)
Synonyms[1]
Oidium Link (1809) Acrosporium Nees (1816) Oideum Ehrenb. (1818) Oospora Wallr. (1833) Amphiblistrum Corda (1837) Oidium Sacc. (1880) Toruloidea Sumst. (1913) Euoidium Y.S.Paul & J.N.Kapoor (1986) Pseudoidium Y.S.Paul & J.N.Kapoor (1986)

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 alphitoides (= O. quercinum) = Microsphaera alphitoides (on oaks)
• (= Acrosporium anacardii) (on cashew)
• Oidium arachidis (on peanut)
• Oidium asteris-punicei (= Erysiphe cichoracearum) (on mangos)
• Oidium balsamii = (on mulleins)
• Oidium begoniae (=O.cyclaminis, O.lini, O.violae) = (on Valerianella, Calluna and Erica)
• (= Monilia candicans)
• Oidium caricae (on papayas)
• Oidium caricae-papayae (on papayas)
• (on papayas)
• Oidium chrysanthemi = Erysiphe cichoracearum (on numerous plant species, especially Asteraceae)
• (= Torula chartarum)
• (= Acrosporium cyparissiae) (on cypress)
• Oidium erysiphoides = Sphaerotheca fuliginea (on melons, watermelons and cucumbers)
• (on spindle-trees)
• Oidium farinosum = Podosphaera leucotricha (on apples)
• Oidium fructigenum = Monilia fructigena (on Rosaceae)
• (on strawflowers)
• (on rubber tree)
• Oidium hortensiae = (on bear's breeches and hydrangea)
• Oidium indicum (on papayas and other tropical fruits)
• (on laurel)
• ( = Euoidium lini)(on flax)
• (on tomatoes)
• Oidium mangiferae
• Oidium manihotis
• Oidium monilioides (=O.tritici)= Blumeria graminis (on cereals)
• (on tomatoes)
• Oidium oxalidis = (on sorrels)
• (on papayas)
• Oidium tingitaninum
• Oidium tuckeri = Uncinula necator (on grapes)

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

Some other species of medical importance previously classified as Oidium include:

• Oidium cutaneum = Trichosporon cutaneum (cause of some human fungal diseases)
• Oidium lactis (=Oidium pulmoneum) = Geotrichum candidum (in soil, water and air, also belongs to normal human flora)

References[]

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