Oidium (genus)

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)
 * Oidium anacardii (= Acrosporium anacardii) (on cashew)
 * Oidium arachidis (on peanut)
 * Oidium balsamii = Erysiphe verbasci (on mulleins)
 * Oidium begoniae (=O.cyclaminis, O.lini, O.violae) = Erysiphe polyphaga (on cornsalad, Calluna and Erica)
 * Oidium candicans (= Monilia candicans)
 * Oidium caricae (on papayas)
 * Oidium caricae-papayae (on papayas)
 * Oidium caricicola (on papayas)
 * Oidium chrysanthemi = Erysiphe cichoracearum (on numerous plant species, especially Asteraceae)
 * Oidium carpini
 * Oidium chartarum (= Torula chartarum)
 * Oidium cyparissiae (= Acrosporium cyparissiae) (on cypress)
 * Oidium erysiphoides = Sphaerotheca fuliginea (on melons, watermelons and cucumbers)
 * Oidium euonymi-japonicae (on spindle-trees)
 * Oidium farinosum = Podosphaera leucotricha (on apples)
 * Oidium fructigenum = Monilia fructigena (on Rosaceae)
 * Oidium helichrysi (on strawflowers)
 * Oidium heveae (on rubber tree)
 * Oidium hortensiae = Microsphaera polonica (on bear's breeches and hydrangea)
 * Oidium indicum (on papayas and other tropical fruits)
 * ''Oidium lauracearum (on laurel)
 * Oidium lini ( = Euoidium lini)(on flax)
 * Oidium lycopersicum (on tomatoes)
 * Oidium mangiferae = Erysiphe cichoracearum (on mangos)
 * Oidium monilioides (=O.tritici)= Blumeria graminis (on cereals)
 * Oidium neolycopersici (on tomatoes)
 * Oidium oxalidis = Microsphaera russellii (on sorrels)
 * Oidium papayae (on papayas)
 * Oidium pullorum
 * Oidium sesami
 * 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)

Oïdium