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Wisconsin State Horticultural Society / Annual report of the Wisconsin State Horticultural Society for the year 1910
Volume XL, Part II (1910)

Milward, J. G.
Spraying the farm orchard,   pp. 36-42 PDF (1.8 MB)


Page 41


SUMMER MEETING.
do effective work. You want high pressure, a fine spray, in-
stead of a coarse nozzle and spraying with low pressure.
'Mr. Kellogg: How are you going to prevent clogging?
Mr. Milward: There is a strainer inside of the spray tank.
Another thing is to clean out the spray tank; if you allow scales
to form inside of your spray tank you will have trouble. See
that there are strainers from the suction pipe to the pump.
Mr. Kellogg: Is there any danger of getting too much Paris
green I
Mr. Milward: No. sir, not with the Bordeaux mixture, if
you are anywhere within reasonable limits; you can put in plenty
of lime. I never saw an injury from Paris green.
A Member: flow much do you use?
Mr. 'Milward: I use from 12 to 14 ounces to 50 gallons.
A Member: Would you want to give the impression that you
use a pound of Paris green,-you say you never saw any injury,
do you want to give the impression that you use as high as a
pound?
Me. Milward: Yes, I have used as high as a pound with the
Bordeaux mixture.
Mr. Reigle: I would like to suggest one thing I did not hear
Mr. Milward mention in reference to nozzles, and that is the
svivel nozzle. You want to get one that will turn so that you
can stand at one side of the tree and turn it so as to throw it un-
der or on the side of the tree.
Dr. Loope: Do you ever find bronzing of apples from spray-
ing?
Mr. Milward: You mean an attack similar to that? (Exhibit-
ing specimen.)  That brings up an important question.  In
spraying orchards some seasons, I have seen that appearance on
apples, where there has been an application of Bordeaux mix-
ture; I have investigated the question quite thoroughly, and I
think undoubtedly that russeting of the skin arises from two
causes; one, that it is a mechanical injury of the spray mixture
being thrown against the tender skin of the apple early in the
season. When the apple is growing very rapidly, and especially
some of the varieties such as the Longfield, if you use the power
sprayer, and it is more noticeable where power sprayers are used,
and force the spray mixture against the apples, you will find
some that are affected in this way. It is partly due, perhaps, to
chemical causes; -authorities disagree on that, but I think it is
41


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