- Plant Pathology. a disease of plants, characterized by a cottony, usually whitish coating on the surface of affected parts, caused by any of various fungi.
- any of these fungi.Compare downy mildew, powdery mildew.
- any of similar coatings or discolorations, caused by fungi, as that which appears on fabrics, paper, leather, etc., when exposed to moisture.
- to affect or become affected with mildew.
Origin of mildew
Examples from the Web for mildew
The very spectacle of that form which I had learned to love is mildew and contagion to my eyes.Imogen
Of these, mealy-bug, red-spider, thrips and mildew are most troublesome.
The only fungous disease of the grape troublesome in the greenhouse is mildew.
The vine is vigorous, hardy and productive but subject to mildew and rot.
The vine is vigorous, hardy and productive but susceptible to mildew.
- to affect or become affected with mildew
Word Origin and History for mildew
mid-13c., mildeu "honeydew, nectar," from Old English meledeaw "honeydew" (sticky stuff exuded by aphids), from Proto-Germanic compound of *melith "honey" (see Melissa) + *dawwaz "dew" (see dew). Cf. Old Saxon milidou, Dutch meeldauw, German Meltau "mildew."
First element in many cases assimilated to forms of meal (n.2) "ground grain." As a kind of fungus it is first recorded mid-14c., so called from its being sticky and originally growing in plants. As a verb from 1550s. Related: Mildewed.
- Any of various fungi or oomycete organisms that form a white or grayish coating on surfaces, such as plant leaves, cloth, or leather, especially under damp, warm conditions. Powdery mildews are important plant diseases usually caused by ascomycete fungi, while downy mildews, including a serious disease of grapevines, are caused by oomycetes.