''Oidium'' is a genus of

Deuteromycetes The fungi imperfecti or imperfect fungi, are fungi which do not fit into the commonly established taxonomic classifications of fungi that are based on biological species concepts or morphological characteristics of sexual structures because thei ...

, where traditionally most

anamorph In mycology, the terms teleomorph, anamorph, and holomorph apply to portions of the life cycles of fungi in the phyla Ascomycota and Basidiomycota: *Teleomorph: the sexual reproductive stage (morph), typically a fruiting body. *Anamorph: an ase ...

s of the order

Erysiphales Erysiphales are an order of ascomycete fungi. The order contains one family, Erysiphaceae. Many of them cause plant diseases called powdery mildew. Systematics The order contains one family (Erysiphaceae), 28 genera and approximately 100 speci ...

are included. Most of them are plant pathogens causing different forms of

powdery mildew Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of ascomycete fungi in the order Erysiphales. Powdery mildew is one of the easier plant diseases to identify, as ...

, for example: *''Oidium alphitoides'' (= ''O. quercinum'') = '' Microsphaera alphitoides'' (on

oak An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably ''L ...

s) *''

Oidium anacardii Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' (= ''Acrosporium anacardii'') (on

cashew The cashew tree (''Anacardium occidentale'') is a tropical evergreen tree native to South America in the genus ''Anacardium'' that produces the cashew seed and the cashew apple accessory fruit. The tree can grow as tall as , but the dwarf cult ...

) *'' Oidium arachidis'' (on

peanut The peanut (''Arachis hypogaea''), also known as the groundnut, goober (US), pindar (US) or monkey nut (UK), is a legume crop grown mainly for its edible Seed, seeds. It is widely grown in the tropics and subtropics, important to both small ...

) *''Oidium asteris-punicei'' (= ''

Erysiphe cichoracearum ''Erysiphe cichoracearum'' is a fungal plant pathogen that causes powdery mildew disease of cucurbits, including melon, cucumber, pumpkin, and squash. The primary symptoms are white, powder-like spots on the leaves and stems. ''Sphaerotheca fu ...

'') (on

mango A mango is an edible stone fruit produced by the tropical tree ''Mangifera indica''. It is believed to have originated in the region between northwestern Myanmar, Bangladesh, and northeastern India. ''M. indica'' has been cultivated in South a ...

s) *''Oidium balsamii'' = '' Erysiphe verbasci'' (on mulleins) *''Oidium begoniae'' (=''O.cyclaminis'', ''O.lini'', ''O.violae'') = ''

Erysiphe polyphaga ''Erysiphe'' is a genus of fungi in the family Erysiphaceae. Many of the species in this genus are plant pathogens which cause powdery mildew. Species This genus includes, but is not limited to the following species: * ''Erysiphe alphitoides'' * ...

'' (on '' Valerianella'', ''

Calluna ''Calluna vulgaris'', common heather, ling, or simply heather, is the sole species in the genus ''Calluna'' in the flowering plant family Ericaceae. It is a low-growing evergreen shrub growing to tall, or rarely to and taller, and is found wide ...

'' and ''

Erica Erica or ERICA may refer to: * Erica (given name) * ''Erica'' (plant), a flowering plant genus * Erica (chatbot), a service of Bank of America * ''Erica'' (video game), a 2019 FMV video game * ''Erica'' (spider), a jumping spider genus * Eric ...

'') *''

Oidium candicans Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' (= ''Monilia candicans'') *''

Oidium caricae ''Oidium caricae-papayae'' is a plant pathogen. References External links Fungal plant pathogens and diseases caricae-papayae {{fungus-plant-disease-stub ...

'' (on

papaya The papaya (, ), papaw, () or pawpaw () is the plant species ''Carica papaya'', one of the 21 accepted species in the genus ''Carica'' of the family Caricaceae. It was first domesticated in Mesoamerica, within modern-day southern Mexico and ...

s) *'' Oidium caricae-papayae'' (on papayas) *''

Oidium caricicola Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' (on papayas) *''Oidium chrysanthemi'' = ''

'' (on numerous plant species, especially

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

) *''

Oidium carpini Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' *'' Oidium chartarum'' (= ''Torula chartarum'') *''

Oidium cyparissiae Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' (= ''Acrosporium cyparissiae'') (on

cypress Cypress is a common name for various coniferous trees or shrubs of northern temperate regions that belong to the family Cupressaceae. The word ''cypress'' is derived from Old French ''cipres'', which was imported from Latin ''cypressus'', the ...

) *''Oidium erysiphoides'' = ''

Sphaerotheca fuliginea ''Podosphaera fuliginea'' (also known as ''Podosphaera xanthii'') is a plant pathogen that causes powdery mildew on cucurbits. ''Podosphaera fuliginea'' and '' Erysiphe cichoracearum'' are the two most commonly recorded fungi causing cucurbit pow ...

'' (on

melon A melon is any of various plants of the family Cucurbitaceae with sweet, edible, and fleshy fruit. The word "melon" can refer to either the plant or specifically to the fruit. Botanically, a melon is a kind of berry, specifically a "pepo". The ...

watermelon Watermelon (''Citrullus lanatus'') is a flowering plant species of the Cucurbitaceae family and the name of its edible fruit. A scrambling and trailing vine-like plant, it is a highly cultivated fruit worldwide, with more than 1,000 varieti ...

s and

cucumber Cucumber (''Cucumis sativus'') is a widely-cultivated Vine#Horticultural climbing plants, creeping vine plant in the Cucurbitaceae family that bears usually cylindrical Fruit, fruits, which are used as culinary vegetables.

s) *'' Oidium euonymi-japonicae'' (on spindle-trees) *''Oidium farinosum'' = '' Podosphaera leucotricha'' (on

apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wh ...

s) *''Oidium fructigenum'' = '' Monilia fructigena'' (on

Rosaceae Rosaceae (), the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera. The name is derived from the type genus ''Rosa''. Among the most species-rich genera are ''Alchemilla'' (270), ''Sorbus ...

) *'' Oidium helichrysi'' (on

strawflower ''Xerochrysum bracteatum'', commonly known as the golden everlasting or strawflower, is a flowering plant in the family Asteraceae native to Australia. Described by Étienne Pierre Ventenat in 1803, it was known as ''Helichrysum bracteatum'' fo ...

s) *'' Oidium heveae'' (on

rubber tree ''Hevea brasiliensis'', the Pará rubber tree, ''sharinga'' tree, seringueira, or most commonly, rubber tree or rubber plant, is a flowering plant belonging to the spurge family Euphorbiaceae originally native to the Amazon basin, but is now pa ...

) *''Oidium hortensiae'' = '' Microsphaera polonica'' (on bear's breeches and

hydrangea ''Hydrangea'', () commonly named the hortensia, is a genus of over 75 species of flowering plants native to Asia and the Americas. By far the greatest species diversity is in eastern Asia, notably China, Korea, and Japan. Most are shrubs tall, ...

) *'' Oidium indicum'' (on papayas and other tropical fruits) *'' Oidium lauracearum (on

laurel Laurel may refer to: Plants * Lauraceae, the laurel family * Laurel (plant), including a list of trees and plants known as laurel People * Laurel (given name), people with the given name * Laurel (surname), people with the surname * Laurel (mus ...

) *'' Oidium lini'' ( = ''Euoidium lini'')(on

flax Flax, also known as common flax or linseed, is a flowering plant, ''Linum usitatissimum'', in the family Linaceae. It is cultivated as a food and fiber crop in regions of the world with temperate climates. Textiles made from flax are known in ...

) *'' Oidium lycopersicum'' (on

tomato The tomato is the edible berry of the plant ''Solanum lycopersicum'', commonly known as the tomato plant. The species originated in western South America, Mexico, and Central America. The Mexican Nahuatl word gave rise to the Spanish word ...

es) *'' Oidium mangiferae'' *'' Oidium manihotis'' *''Oidium monilioides'' (''=O.tritici'')= ''

Blumeria graminis ''Blumeria graminis'' (commonly called barley powdery mildew or corn mildew) is a fungus that causes powdery mildew on grasses, including cereals. It is the only species in the genus ''Blumeria''. It has also been called ''Erysiphe graminis'' and ...

'' (on

cereal A cereal is any Poaceae, grass cultivated for the edible components of its grain (botanically, a type of fruit called a caryopsis), composed of the endosperm, Cereal germ, germ, and bran. Cereal Grain, grain crops are grown in greater quantit ...

s) *''

Oidium neolycopersici Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' (on tomatoes) *''Oidium oxalidis'' = '' Microsphaera russellii'' (on

sorrel Sorrel (''Rumex acetosa''), also called common sorrel or garden sorrel, is a perennial herbaceous plant in the family Polygonaceae. Other names for sorrel include spinach dock and narrow-leaved dock ('dock' being a common name for the genus '' ...

s) *'' Oidium papayae'' (on papayas) *'' Oidium pullorum'' *''

Oidium sesami Oidium may refer to: * ''Oidium'' (genus), a genus of fungi in the family Erysiphaceae *Oidium (spore), a type of fungal spore *Oidium, a disease of grapes caused by the fungus species ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe n ...

'' *'' Oidium tingitaninum'' *''Oidium tuckeri'' = ''

Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe necator'') is a fungus that causes powdery mildew of grape. It is a common pathogen of Vitis species, including the wine grape, ''Vitis vinifera''. The fungus is believed to have originated in North America ...

'' (on

grape A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus ''Vitis''. Grapes are a non- climacteric type of fruit, generally occurring in clusters. The cultivation of grapes began perhaps 8,000 years ago, ...

s) ''Oidium albicans'' has been a parallel name of the yeast ''

Candida albicans ''Candida albicans'' is an opportunistic pathogenic yeast that is a common member of the human gut flora. It can also survive outside the human body. It is detected in the gastrointestinal tract and mouth in 40–60% of healthy adults. It is us ...

'' (not related to the powdery mildew). Some other species of medical importance previously classified as ''Oidium'' include: *''Oidium cutaneum'' = ''

Trichosporon cutaneum ''Trichosporon'' is a genus of anamorphic fungi in the family Trichosporonaceae. All species of ''Trichosporon'' are yeasts with no known teleomorphs (sexual states). Most are typically isolated from soil, but several species occur as a natura ...

'' (cause of some human fungal diseases) *''Oidium lactis'' (=''Oidium pulmoneum'') = ''

Geotrichum candidum ''Geotrichum candidum'' is a fungus which is a member of the human microbiome, notably associated with skin, sputum, and faeces where it occurs in 25–30% of specimens. It is common in soil and has been isolated from soil collected around the w ...

'' (in soil, water and air, also belongs to normal human flora)

References

Deuteromycota Fungal plant pathogens and diseases Erysiphales Leotiomycetes genera Taxa named by Johann Heinrich Friedrich Link Taxa described in 1824 {{Plant-disease-stub