The Kendrick gazette. [volume] (Kendrick, Idaho) 1892-1968, 1921-07-08
lnsecticide Information


pests that attack the garden plants.
In order to reach a greater number |
of people with replies to these in
quiries, County Agent O. S. Fletcher
has prepared the following article
In regard to the control of common |
insect pests.
Insects which are attacking plants
may be classified INTO Cd chewing
or biting forms, which attack
leaves and other portions of the
plant; (2) sucking forms which in
jure and destory plants by draining
their vital life juice. Sucking forms
include aphide or plant lice, onion
thrlps, red spider and similar IN
sects. Chewing forms common in
this lsect1on are Colorado potato
beetle, potato flea beetle, aebbage
worms and several other types .ot
worms.
Chewing forms are best controlled
by the application of arsenical
polsons, such as arsenate of lead and
Paris green, to the foliage which
the insects are attacking. Sucking
forms should be controlled with
contact polsons or smothering
sprays, such as Black leaf 40 or
kerosene emulsion applied directly
to the insect.
Formulas for Insecticides
Arsenate of Lead.
No. l.
Arsenate of lead (paste) 2 pounds
Water so gallons
No. 2.
.Arsenate of lead (powder) ! pound
Water so gallons
in mixing the amount of arsenate
of lead for each spray tank 1T should
be worked into very thin paste,
and should never be thrown as a
mass into spray tank.
Or l ounce or 5 heaping teaspoons
full powdered Arsenate of lead and
2 gallons of water.
Paris Green
Air-sIaked lime pounds
Water 81 gallons
Or ] OF. or 1 heaplngI teaspoonfuI
Paris green, 2 gals. water, 2 OF.
alr-sIaked lime.
Black Leaf 40
Black Leaf 40 l lquart
Soap pounds
Water 200 gallons
Or l teaspoonful Black Leaf 40,
I OF soap, gallon water.
Kerosene Emulsion
Kerosene gallons
Whale oil soap q pound
Water lgallon
Dissolve soap IN hot water. Add
Kerosene to hot suds. Agitate the
mixture so as to emulslfy. Dilute
this stock solution at the rate of ]
gallon to 9 gallons of water for
average summer use.
Or dissolve ounces of soap in
one pint OF hot water, then add
quart of kerosene and dilute with
5 quarts water. Arsenate of leac
for chewing insects, and Black Leaf
40 for sucking forms are the poison!
most commonly used at the presen
time.
Spraying with the proper poisor
should be done thoroughly as soor
as insects are found and recognized
in applying arsenate of lead o.
Paris Green for chewing insects
the ideal spray is fine mist ant
the best work is done when tn
plant is thoroughly and evenly GOV
cred by fine drops. Stop sprayin,
before the foliage is thorough.
drenched. In spraying for suckln,
insects, the operator should remem
Der that the insects themselves ar
to be sprayed and should see to j
that all get thorough application
of, the spray. For either chewing
or sucking insects, the higher tn
pressure the better the spray
Clean the sprayer every time afte
using. For delicate foliage, spra
after the plants are IN the shade
Hot sunlight is dangerous to plant
with many SPRAYS, such as kerosen
emulsion.
If you have insect pests that ar
attacking the garden, the time t
spray is now. For further informs
ton, write to Claude Wakelano
Entomologist, Extension Dlvlslor
BOISE, Idaho, or to o. S. Fletcher