Plant Diseases of 1901 . 
23 
if sufficient lime has been used. More lime must be added until 
the test shows no reaction, when the mixture is ready for use. A 
slight excess of lime will do no harm and will be a safe-guard 
against possible error. 
Bordeaux mixture deteriorates rapidly, therefore it should be 
used on the same day it is made. 
It is often desirable to apply poison to the same plants that are 
to be sprayed with Bordeaux. Fortunately the two remedies may 
be combined and both applied with one operation. Any of the 
arsenical compounds may be used, and at the same rate when 
mixed with water. 
RESIN-BORDEAUX MIXTURE. 
Recommended by * Sirrine for spraying asparagus, cabbage 
and other plants to which the common Bordeaux mixture does not 
readily adhere. Also as a poison carrier to make poison mixtures 
adhere to the same class of plants. 
Resin.5 pounds 
Potash lye.1 pound 
Pish oil.1 pint 
Water.5 gallons 
Place the oil and resin in a kettle and heat until the ingredients 
are dissolved. Then remove from the fire, and when slightly 
cooled, add the lye slowly, while the mass is being con¬ 
tinuously stirred. The water is now added and the mixture is 
boiled until it will mix with cold water, when it forms an amber 
colored liquid. Care should be taken at all times to keep the 
materials from boiling over and catching fire. 
The above forms a stock mixture of which two gallons are 
used to forty-eight gallons of Bordeaux made in the usual manner. 
It is found best, however, to dilute the resin mixture with about 
eight parts of water before it was added to the Bordeaux. 
The materials are used in the same proportions when Paris 
green or other similar poisons are being used on plants. 
* New York State Agri. Expt. Sta., Bulletins 144 and 188. 
