Definition of Bordeaux mixture in English:

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Bordeaux mixture


A fungicide for vines, fruit trees, and other plants composed of equal quantities of copper sulfate and calcium oxide in water.
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.

For editors and proofreaders

Syllabification: Bor·deaux mix·ture

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