bor·deaux mixture /bɔrˈdo, ˈbɔrˌ/
Bor·deaux mix·ture. Hort. A fungicidal mixture composed of blue vitriol, lime, and water. The formula in common use is: blue vitriol, 6 lbs.; lime, 4 lbs.; water, 35 -- 50 gallons.
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Bordeaux mixture
n : antifungal agent consisting of a solution of copper sulphate
and quicklime