The Hood River glacier. (Hood River, Or.) 1889-1933, 1916-01-13
ISCAB DISCUSSION
TO Be CONTINUED
(From the Mosier Bulletin)

lrrom the Moeler bulletlnl
Scab was the subject of discussion at
the second meeting Of the Mosier Hor-
ticultural society in Chown's hall.
Lee Evans lead the discussion and was
followed by number Of growers who
told their experiences in regard to the
development of scab and worms in
their orchard this year. Various re-
suits we're obtained in the use of the
different sprays. but the prevalence of
scab this year was attributed to the
weather conditions. Among those who
made talks were E. o. Winans, G. c.
Brooks, A, B. Burton. Geo. Evans,
Hugo E. Birkner, J. r. Carroll, DR..
David Robinson. and r. ID. Chatfeld.
For the next meeting. which will be
held Saturday morning at 10 o'clock.
the same subject will be continued.
The date was changed to accommodate
more of the growers and large repre-
sentation is desired at this meeting.
The value of the different sprays will
also be discussed. Hugo E. Birkner
has prepared some slides showing the
termination and development of the
scab spores which will be thrown on a
screen.
Following is the paper read by MIR.
Birkner at the first meeting, wherein
he points out the virtues of the many
spray accessories:
Not enough attention is paid to the
accessories Of the power sprayer. A
sprayer improperly equipped with the
necessary accessories can only be
source of trouble instead Of help to
the fruit grower. A pump of the
proper capacity with an engine capable
Of running it does not make sprayer
efficiency.
Pressure Regulators-A poor relief
valve or pressure regulator will destroy
the efficiency of the best pump ever
built. The great number of different
relief.valves and pressure regulators
which have been brought out by the
manufacturers in recent years is evil
dence Of the difficult nature Of this
problem in sprayer construction, and
also explains why this is the weakest
point in most sprayers.
The old style water relief-valves are
not certain in action. With this type,
when the pressure runs up high enough
to compress the springs valve is
opened and the surplus liquid allowed
to pass through 1t into the spray tank.
II both nozzles are shut off. the relief
valve must have a capacity sufficient
to care for the full rating of the pump.
1t is therefor obvious that some liquid
is passing through the relief-valve all
the time the nozzles are not using the
full capacity of the pump. The engine
and the valves are working the hardest
when the operator is doing the least.
This continued flow of gritty liquid.
under high pressure, through the re.
lief-vslve, soon "wire cuts" the valve
and valve seats, 80 that leakage re-
suits, and the efficiency Of the best
pump is reduced.
/ This cutting action is lessened in the
Crown and similar relief-valves. In
stead of having a valve which fits on
seat. they have plunger which
works in a cylinder having number
Of portfolios through which the sur
plus liquid is allowed to pass when the
pressure forces the plunger back to
certain point.
The Hardie sprayers are now equipped
with pressure regulator which takes
all the load off the engine as soon as
the nozzles are shut off. The Bean
pressure regulator likewise holds un-
form pressure, and when the nozzles
are shut off. the engine instantly works
free. just as though there was no
pressure in the air chamber. The
King pressure regulator and load con-
troller is similar device. These all
have two sets of valves and are set
between the pump and the pressure
tank. The pressure from the tank
acts on diaphram or piston and when
the pressure reaches point higher
than that at which the regulator is
set. the diaphram or piston moves up
and closes the valve leading to the
air.chamber. allowing the liquid to 60
back into the tank. but not under pres.
sure. In other words the liquid from
the pump. when being used through
the nozzles. passes through the valve
into the air chamber under pressure,
but when it Is not used through the
nozzles. it goes back into the tank
without any labor having been ex-
pended.
The Grown Specially company has
another regulator which permits the
pump to deliver only the required
liquid to supply the nozzles. 1t is
attached to the suction of the pump.
and when the desired pressure is
reached. the suction is closed and the |
pump works against a vacuum. The
valves in the pump hold the pressure
until the liquid is used and the pres-
sure runs down. then the suction is
again opened and the pump resumes
its work.
There are number of devices manu-.
factured to disconnect the engine from
the pump. when the pressure is high.
The Champion power sprayer trans
mits the engine power to the pump by
the means of a large gear wheel on the
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