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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.

Some of these, especially Bordeaux mixture, have been experimented with on a very large scale, especially in America, and various forms of spraying machines have been introduced for dealing with large areas.

Whether Bordeaux mixture or any other copper solution will protect the shrub from attack, is not known.

Spraying with Bordeaux mixture, in advance of the occurrence of any disease, is recommended.

Bordeaux mixture is also effective as a repellent.