This page provides all possible meanings and translations of the word oidium
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A fragile spore produced by some fungi
A fungus, Uncinula necator , that produces powdery mildew in grapes
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An oidium is an asexually produced fungal spore that 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.
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