Definition of Bordeaux mixture in English:

Bordeaux mixture

Syllabification: Bor·deaux mix·ture


  • A fungicide for vines, fruit trees, and other plants composed of equal quantities of copper sulfate and calcium oxide in water.
    More example sentences
    • Some prominent inorganic pesticides include Bordeaux mixture, a complex fungicide with several copper-based active ingredients, used for fruit and vegetable crops.
    • The soil acidity of the Médoc in Bordeaux, for example, also promotes copper toxicity where there has been a buildup of copper in the topsoil from spraying vines with Bordeaux mixture.
    • Copper based fungicides such as Bordeaux mixture can be used as a treatment for these, although the symptoms disappear when environmental conditions change.


late 19th century: first used in the vineyards of the Bordeaux region.

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