Definitions for "Oïdium"
Keywords:  mildew, powdery, oidium, spore, fungal
A genus of minute fungi which form a floccose mass of filaments on decaying fruit, etc. Many forms once referred to this genus are now believed to be temporary conditions of fungi of other genera, among them the vine mildew (Oïdium Tuckeri), which has caused much injury to grapes.
(oh-ee'-d'yum) The powdery mildew fungus that devastated the vineyards of Europe in the mid-nineteenth century. Like the phylloxera plague that would follow, Oidium was brought from America. It is now controlled in the vineyard by spraying.
n. (pl. oidia) Thin-walled cell that functions as a spore or in sexual processes in fungi.