30 
Bulletin 71. 
23. RESIN SOAP (WINTER WASH). 
*Resin . 30 pounds 
Caustic Soda (70 per cent.).. 9 pounds 
Fish-oil . 434 pints 
Water.100 gallons 
Place the first three ingredients in an iron kettle and cover with 
five or six inches of water. Boil for an hour or two until the liquid 
has a dark brown color, after which the remainder of the water may 
be added. 
Other formulae for the preparation of resin soaps have been 
given, but as they are not much used, I will not take space to give 
them here. 
24. PYRETHRUM, OR BUHACH. 
This substance is a vegetable powder and is obtained by pul¬ 
verizing the dried blossoms of plants of the genus Pyrethrum. It 
may be obtained at almost any drug store, and is peculiar in its 
power to kill insects while it is not poisonous to the higher animals. 
It may be used either wet or dry. If applied in water, use in the 
proportion of: 
Pyrethr.um.1 ounce 
Water.3 gallons 
If applied dry, use pure and make a very light application, or 
dilute with flour and apply more freely. 
If thoroughly disseminated in the air of a room it will soon 
bring to the floor all the flies and mosquitoes therein. A good way 
to rid a room of flies is to make the application and close the room 
tightly for the night. Then in the morning sweep up the flies and 
burn them. If they are not destroyed in this way after being stupe¬ 
fied, many will finally overcome the action of the powder and live. 
25. TOBACCO. 
Tobacco has long been used in one way or another for the 
destruction of insects. Its chief use seems to be for the destruction 
of animal and plant lice. When slowly burnt the smoke may be 
utilized for the destruction of lice on plants in greenhouses or win¬ 
dow gardens. In the form of a fine dust it is often effectual in 
ridding plants of flea-beetles, and in the form of dust or stems is 
probably the best remedy we have for woolly aphis on the roots of 
apple trees. 
A decoction made by boiling tobacco stems in an amount of water 
sufficient to cover them is destructive to plant lice (Aphididse) and to 
lice upon cattle. Tobacco, very finely powdered, in the form of 
* This formula and directions are copied from “ The Spraying of Plants 
by Lodeman. 
