231 WATCHING 
AND SPRAYING 
pounds of lime slaked in 40 gallons of water. 
Four gallons of each will make a basis for 50 
gallons of Bordeaux mixture. 
The only disadvantage to Bordeaux mixture 
is that it discolors the plant, it being a ‘blue 
whitewash’”’; and those who object to the dis- 
coloration often use the ammoniacal carbonate 
of copper, rather than the sulphate. But this 
is not so sure a remedy, neither does it stick 
so well. It is made by dissolving an ounce of 
carbonate of copper in a pint of water and add- 
ing it to a quart of ammonia. If the ammonia 
is strong, use only enough to thoroughly dis- 
solve the copper, otherwise it will injure the 
plants. Cork the mixture tightly and when 
wanted for use, add from 8 to about 20 gallons 
of water to each ounce of the copper. This is 
used principally on fruit that is nearly grown, 
or upon purely ornamental plants, to avoid dis- 
coloration. 
Bordeaux cannot cure internal diseases of 
the plants. These may be caused by insect 
borers at the roots, or by some incurable bac- 
terial trouble, and in this case there is nothing 
you can do but root up the affected plants and 
destroy them, and then study out how you can 
prevent its happening again. 
Sprays for insects usually consist of some form 
