Bordeaux mixture

American  

noun

Horticulture.

1. a fungicide consisting of a mixture of copper sulfate, lime, and water.

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Bordeaux mixture British  

noun

1. horticulture a fungicide consisting of a solution of equal quantities of copper sulphate and quicklime

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Etymology

Origin of Bordeaux mixture

1890–95; free translation of French bouillie bordelaise. See boil ¹, Bordelaise

Example Sentences

The authors describe joyful peasants pulling loads of freshly harvested grapes through vine rows painted with this chemical spray that became known as the Bordeaux mixture.

From Washington Post • Nov. 24, 2021

A second complicated set of pumps and pipes squirts the bright blue Bordeaux mixture that keeps off the sigatoka disease.

From Time Magazine Archive

David Fairchild and an associate were the first to try out Bordeaux mixture with success on Virginia vineyards.

From Time Magazine Archive

Copper hydroxide used as a spray is 15 times more effective as a fungicide than Bordeaux mixture commonly used on plants, and moreover leaves no stain.

From Time Magazine Archive

I sprayed once with Bordeaux mixture; have no faith in it; I may possibly have reduced the codling-moth a little.

From The Apple by Various