· Insecticides and Fimgicides. 15
k sometimes be employed to advantage in its pure state, and
.- for beds and other furniture infested with bedbugs it is one
· _ of the very best of insecticides.
y i When used on plants it is necessary to make an· emulsion
of it, which may be done by dissolving % pound of whale-oil
or laundry soap in a gallon of boiling water, then adding to
this two gallons of coal-oil and churning the two vigorously _A
  for ten minutes, using for the purpose a spray pump, the
* ; Huid being returned forcibly through the nozzle to the vessel
{ from which it is being sucked up by the pump. One part of
, the emulsion may be mixed with nine of water before apply-
  ing to plants.
  — i The diluted emulsion is one of the very best of insecti-
I cides for destroying plant lice and bark lice, and may be
l used for any insect that can conveniently be reached by a
  spray. For summer use against bark lice it has a special
  value, since at this season of the year it is impracticable to
‘ i p use strong soap solutions and the lime-sulphur wash, both
V good sprays for winteruse. The cost of kerosene for exten-
sive-spraying has led to the employment of the crude oils,
  which when emulsiiied answer the same purpose.
P
CRUDE OILS.
Like kerosene the crude petroleum is liable to do injury
p to plants. An emulsion may be made of it, and has been
used with good effect for scale insects in winter, as well as
for the destruction of the cattle tick, in the latter case be-
ing applied by dipping, by spraying with ordinary sprayers,
or by the use of a special cattle-spraying machine, known as
» the Seabury Machine. Under trade names preparations of
crude petroleum and soap have for some years been on the
market where theyl are known as miscible or soluble oils.
· _ They can be diluted with water and used at once.
l Homemade miscible oils can very readily be prepared by
heating ina kettle, fish oil, crude carbolic acid and granulat-
ed caustic potash, then stirring into this crude oil, or paraHfin .