An oidium (plural: oidia) is an asexually produced
fungal
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...
spore
In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, f ...
that (in contrast to
conidia
A conidium ( ; ), sometimes termed an asexual chlamydospore or chlamydoconidium (), is an asexual, non-motile spore of a fungus. The word ''conidium'' comes from the Ancient Greek word for dust, ('). They are also called mitospores due to the ...
) 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 cannot survive in unfavourable conditions.
References
*
Illinois Mycological Association
The Illinois Mycological Association or IMA is a group of mushroom enthusiasts, citizen scientists, foragers, and professional mycologists based in the Chicago area.
Meetings are held monthly, except in some winter months, at the Niles Histor ...
glossar
Fungal morphology and anatomy
{{Mycology-stub
pt:Oídio