This article is about a type of fungal spore. For the ascomycete genus, see Oidium (genus). For the fungus that causes powdery mildew on grapes, see Uncinula necator. For the song and album Oops,... I Did It Again by Britney Spears, abbreviated as OIDIA, see here and here.

An oidium (plural: oidia) is an asexually produced fungal spore that (in contrast to conidia) is presumed not to constitute the main reproductive preoccupation of the fungus at that time. The hypha breaks up into component cells/ small pieces and develop into spores. Oidia can't survive in unfavourable conditions.

See also


  • Illinois Mycological Association glossary

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