Graham guardian., 1912-04-05

cially both as paste and as a
powder. The paste is the older and
more generally used form, although
it is more expensive than the powder,
containing from 40 to SO per cent
water which adds to transportation
charges. In general one-half pound
of powder can be substituted for
one pound of paste. Arsenate of
lead adheres we'll and there is prac-
tically no danger of burning new
tender foliage with it. In mixing
add small quantity of water to the
required amount of arsenate of lead
and make a thin paste. This will
then mix readily with the full amount
of water. To insure uniform distri-
button of the poison the mixture
should be kept well agitated while
spraying. By adding soap (prefer-
ably whale oil soap) at the rate of /
pound to so gallons of water the
arsenate of lead will remain in sus,
pension much longer than otherwise
and will adhere better to smooth
surfaces, as shown by experiments in
spraying cabbage leaves. One pound
of arsenate of lead should be used
in so gallons of water in spraying
for the codling moth.
Arsenate of zinc is new insecti-
eide claimed to be as good or better
than arsenate of lead and to be much
cheaper. 1t is reported by one ex-
pertinent station to have been found
the least injurious to fruit trees of
any arsenical tested. This insecti-
eide is sold commercially as white
powder put up in two pound cartons,
guaranteed to contain over 40 per
cent arsenious oxide. This is about
one-fourth more than the arsenious
oxide contents Of the strongest COM
mercial powdered arsenate of lead
and more than two and a half times
as great as ordinary commercial
arsenate of lead pastes. One half
pound should be used to each so
gallons of water against the 'codling
moth. The use of soap is recon-
mended as in the case of arsenate of
lead for holding the arsenate Of zinc
in suspension.
Arsenate of lead paste is manu-
factured by the California Spray
Chemical Co., Watsonville, CAL. The
Grasselli Chemical Co., Cleveland,
Ohio, The Vreeland Chemical Co.,
New York. N. Y. and by many other
concerns.
Arsenate of lead powder is manu-
factured by The Grasseli Chemical
Co. and by The Vreeland Chemical
Co., addresses as above.
Arsehate Of zinc is manufactured
and sold at present, as far as known
to the writer, only by the California
Spray Chemical Co. of Wtsonvilie
Cal.
SPRAYING MACHINERY
AS general rule the cheaper the
spray pump the greater the cost of
operation. Power sprayers do the
work rapidly at about one third the
cost of applying the spray with
hand pump. The outlay Of two
hundred and fifty dollars for power
sprayer is justified and is really
economical in the case of bearing
apple or pear orchards five acres or
more in extent. Orchards of more
than one and less than five acres of
bearing trees should be sprayed
with power sprayers by the coop
Grafton of owners of neighboring
orchards, or else should be sprayed
with one of the large capacity, high
pressure hand pumps. Such hand
pumps give pressures between 100
and l60 pounds and cost between,
forty and sixty dollars for complete
outfits. Barrel pumps are the least
desirable type of .sprayer, but when
necessary to rely upon a pump of
this kind in spraying few trees the
work should be done with extra
thoroughness. Sprayers and acces
sories shoulc be purchased of reliable
manufacturers. The following firms
are among the best known, and any,
one contemplating purchasing a
spray pump should secure catalog
and price list from each:
The Bean Spray Pump Co., San
Jose, Cal.
: The Friend Manufacturing Co.,
Gasport. N. Y.
The Deming Co., Salem, Ohio.
ST. JOSEPH STAKE NEWS
Home Mission Appointments for
.-. Al 1Aal