INSECTS AND INSECTICIDES 
39 
the proportion of a pound to three or four gallons, is destructive to 
plant lice (Aphidse) and to lice upon cattle. Tobacco, very finely 
powdered, in the form of snuff, may also be used dry against the 
same insects. It is best to first spray the insects with water. 
24. SULFUR. 
Everyone knows of the use of sulfur fumes for the destruction 
of animal life. Sulfur is specially destructive to u red spiders” and 
“brown mites,” and may be applied as flowers of sulfur, dry, through 
a blow-gun of some sort, or mixed in soapy water or soap solutions 
in the proportion of an ounce to a gallon of the liquid and applied 
as a spray. The liquid must be kept thoroughly stirred, as the 
sulfur settles quickly. 
\ 
25. HOT WATER. 
Water heated to 130 to 140 degrees Far. kills very quickly 
any insect that is put into it, but is harmless to plants unless they 
are kept submerged for a long time. Lice, especially those on 
roots, may often be killed conveniently with hot water. 
SUBSTANCES THAT KILL BY BEING INHALED. 
There are two insecticides of this sort that are of special im¬ 
portance. As both are destructive to vegetable life also, care must 
be had in their use that they are not applied in strengths that will 
destroy the plants. It is important that tents, rooms, or other re¬ 
ceptacles in which objects are placed for fumigation, be as nearly 
air tight as possible. 
26. CARBON BISULFIDE; U FUMA.” 
This is a clear, extremely volatile liquid with a very disagree¬ 
able odor unless obtained pure, when it is much more expensive. 
The fumes are heavier than air, so that it is always best to expose 
the liquid in the upper part of a building, or other receptacle con¬ 
taining objects to be treated. The fumes are explosive also when 
mixed with air, so that great care must be taken not to bring fire 
near them. 
For the purpose of fumigating a building or other inclosed 
space containing growing plants, not over one pint of the liquid to 
1,000 cubic feet of space should be used. For the destruction of 
insects in seeds, carpets or clothing it may be used much stronger. 
To destroy ant hills, thrust a sharp stick down into the hill 
to a depth of eight or ten inches and then remove it and pour in 
two or three ounces of the carbon bisulfide; fill the hole with earth 
by stamping on it, and then throw over the hill a wet blanket to 
