Great Falls weekly tribune. [volume] (Great Falls, Mont.) 1894-1???, 1895-05-24
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POPULAR INSECTICIDES.
Glasses, Those That Poiso and Those
That Kill by Contact.

ruo Glasses, Those That Poison and Those
a Kill by Contact.
Insecticides are of two kinds Or class
ss-those which kill by poisoning and
Those which kill by contact, killing Ell
ther by irritation Or by smothering. The
unpatented remedies Of the first class
are; Paris green, arsenite of copper,
london purple, arsenite Of lime and
cpsine or arsenate Of lead. These are
sometimes spoken Of as the arsenites.
They can be used in dry powder form
or with water. When used i'll powder
form they should be mixed with flour,
road dust or land plaster at the rate of
part of the poison to Is Or 20 parts
Of -four or plaster.
oRMuLh FOR WATER
Paris grccn or londo purple....... l pound
Lime unslaked. .................. IL pounds
Water Ito make). ................ lGo gallons
Stake the limo and add to the paris
green with sufficient water to make 100
gallons.
For cabbage insects it is best to use
the ~arsenites in water. Milk of lime
should be made from water Stacked lime.
The lime not only prevents any injury
to the foliage, but also aids i'll making
the poison adhere to it.
Gypscile is Il remedy used by the gyp-
~ moth commission, but needs to be
tested further before being recommended
for general use.
The principle insecticides of the sec
Ond class arc kerosene washes, rOsin
wash, b~isulphide of carbon, tobacco and
hot water. Kerosene washes are Of two
sorts, and the formulas are usually Civ
Ell for stock solutions. These are, first:
KEROSENE AND o EMULSION.
Kerosene. gallons
Soap......... = pounu
Water 1 gallon
The soap should be dissolved by boil
ing. Remove from the stove and while
/ hot add the kerosene. Agitate the mix
/ ture by churning or otherwise until it
] has the consistency of cream. Second:
EMULSION OF KEROSENE AND MILK.
ktros' sallohs
Sour milk L gallon
h This simply requires churning with
\ ont heat. The second emulsion will not
4 keep long.
\ These stock solutions should be di-
L lutcd with 10 to 20 parts water when
n used, depending on the susceptibility OF
II the foliage to injury from the emulsion
II and the kind Of insects to be treated.
j The soap emulsion becomes hard by
standing and should be dissolved in Il
N little hot water when wanted for use.
q Care should always be used not to have
i free oil i'll any of the emissions.
N RosIN WASH.
q AuSih' ~ POUNDS
4 r'1''i" SOFA. o pounds
h Elsh Oh. ~ pint9
4 water ito mako. ............... 100 gallons
The rosin and caustic soda should be
finely broken up to help i'll dissolying
| them. Put i'll am iron kettle with the
fish oil and water enough added to cov
TT the whole, Tho Boiling shonld be
/ continued from one to two hours. or TN
til the compound Will mix with water
without forming yellowish flakes.
Omitting IL few special eases, insects
which feed on plants may he divided into
Two g~roups--yiz. biting o. gnawing i'll
sects and sucking or pumping insects.
For the first group, or biting insects,
only the first class Of remedies are prac-
rcal. For the second group, 0 suctorial
Insects, only the second class Of inSecti-
cldes can be used.