86 
Colorado Experiment Station 
Stock Solution of Bordeaux Mixture 
When spraying is to be done on a large scale it may be advisable 
to make stock solutions of the copper-sulfate and lime. Stock solu- 
tions are made as follows : 
1. Dissolve the required amount of copper-sulfate in water at 
the rate of 1 pound to 1 gallon. The bluestone should be sus- 
pended in a cloth sack beneath the surface of the water where 
it will dissolve in a few hours. 
2. Slake the required amount of stone lime and add water enough 
. to make one gallon to each pound of lime. 
These solutions will keep indefinitely. They should be kept in 
closed containers to prevent loss of water by evaporation. To make 
Bordeaux mixture from stock solutions dilute to the necessary 
strength and mix in the usual way. For example (4-5-50) Bordeaux 
mixture is prepared from stock solutions as follows : 
1. Stir stock solution thoroughly. 
2. Dilute 4 gallons of stock solution of copper sulfate to make 
25 gallons. 
3. Dilute 5 gallons of stock solution of lime to make 25 gallons. 
4. Mix these two solutions in the manner given above. 
Precaution — Only wooden or earthen vessels should be used to 
contain the copper-sulfate solution or the Bordeaux mixture for 
they will corrode metal. 
Bordeaux Mixture and Resin-Fish-Oil Soap 
In spraying Asparagus and other plants with a glossy foliage 
it is often necessary to add a substance known as a ‘‘sticker” in 
order that the spray adheres. This is accomplished by adding resin- 
fish-oil soap to ordinary Bordeaux mixture. 
1. Dissolve 2 pounds of resin-fish-oil soap in 2 gallons of water. 
2. After the copper-sulfate and lime solution have been mixed, 
add 2 gallons of soap solution to 50 gallons of Bordeaux mix- 
ture. 
Self-Boiled Lime Sulfur 
Some plants, especially stone fruits, are extremely susceptible 
to injury from Bordeaux spray. For spraying such plants self-boiled 
lime-sulfur is often used. This spray is prepared as follows: 
1. Weigh out 32 pounds of lime and 32 pounds of sulfur. The 
sulfur should be thoroughly sifted. 
2. Place the lime in a barrel and add about 4 gallons of water. 
3. Add sulfur as soon as the lime begins to slake. Stir vigorously, 
adding enough water to make the mixture pasty. 
