• A FEW ORCHARD PLANT LICE 45 
giving iinmediate and thorough agitation when the boiling soap¬ 
suds and kerosene are poured together, and in the use of clean 
soft water. 
The apparatus may vary with the amount to be prepared. 
Those preparing to use several spray tanks of the material and 
possessing a gasoline power spray outfit find it most convenient to 
perform the agitation by placing the boiling hot soap-suds and the 
kerosene together in the spray tank and forcing the mixture through 
the pump. This churns the liquid thoroughly. Mr. B. A. Smith 
of Grand Junction, successfully prepares enough of the stock emul¬ 
sion at one time in this way for five two-hundred gallon tanks of 
6 per cent spray. He first dissolves in a home-made cooking vat 
with galvanized iron bottom and wooden sides, thirty pounds soap 
with thirty gallons of water, and when this is boiling hot it is 
poured into the spray tank upon 6o gallons of kerosene previously 
emptied into the tank. The gasoline engine then forces the mixture 
through the pump and a short spray hose back into the tank under 
a high pressure for several minutes until oil and soap-suds are com¬ 
pletely combined. The whole solution, about lOO gallons, is then 
run off into an extra dismounted spray tank and 1-5 of the stock 
solution used for each 200 gallon tank, thus giving approximately 
6 per cent oil in the spray. The apparatus is equipped with a 
mechanical agitator in the tank which operates while the emulsion 
is being made, but the action of these mechanical agitators will not 
alone form a good emulsion, and the mixture must also be pumped 
as described out from the tank through a spraying nozzle hose and 
back into the tank again. 
Enough for a two hundred gallon spray tank may be made in 
a 50 gallon barrel fitted with a good hand barrel pump for agita¬ 
tion. Smaller amounts may be prepared with wash-boilers or tubs 
as heating vessels for the soap-suds, and to contain the oil and 
soap-suds when being emulsified and a good hand bucket pump 
will perform the agitation. If a very small quantity is to be used 
for a few house plants an egg beater will suffice for the agitation. 
Many kinds of soap may be used to prepare the emulsion. 
Tak-a-Nap soap, whale-oil soap and Laundry soap have been 
most commonly used by the growers. The cost of the soaps should 
be considered. Tak-a-Nap soap is a soft soap and disolves readily. 
It should be heated to boiling in water when dissolved the same as 
other soaps insure the best results, instead of attempting to com¬ 
bine soap-suds and kerosene cold. 
Those who have trouble in making kerosene emulsion can pro¬ 
cure a commercial article known as “Aphisicide” manufactured at 
Grand Junction, or else use some other good contact insecticide 
instead. 
