The Hood River glacier. (Hood River, Or.) 1889-1933, 1920-05-13
DIR. MACRUM GIVES
FORMULA FOR SPRAY

This article was published in the
Glacier in January. At the request of
numerous growers, who wish to place
the recommendations on their files, it
is reprinted.
DIR. C. A. Macrum, former commits
sioner of horticulture for the Fourth
Oregon district, in his report to the
State Board of Horticulture last year
gives formula for spray that he
has tested on his Mosier ranch and has
found effective in eliminating numer-
GUS sprays and resisting action of
spring rains.
MIR. Macrum in his report says:
have been much interested in the
problem of reducing the number of
sprayings necessary for ecab control
and also Developing a spray which
would resist the action of spring rains.
1t occurred to me that combined Bor-
deaux oil emulsion spray, applied as
| the buds are opening. before the bios
SONS appear, would control scab, San
Jose scale. the aphis, leaf roller. red
| spider, curl leaf of the peach, and the
copper would be present to prevent the
raVages of the anthracnose spores
Wnen the rams cOlhS III tlS IAN VI tHe
year.
| was unable to find that the com
| bination had been made or used
wrote to Prof. Foster. of the General
Chemical Company, and requested that
he make the combination if he did net
already have formula at hand. p Of.
Foster replied that he did not recall
having seen a formula. but he would
endeavor to make the combination. A
year following Prof. Foster sent me
the formula together with a report on
the results he had had. In this report
he mentioned the successful results
he had in control of the disease in
prunes due to cylinrosporum. The
method of preparation is as follows:
Prepare the copper sulphate solution
in the usual proportions of one pound
to the gallon of water, dissolve II
pounds of common glue in u gallons of
water, slack II pounds of lime, stir IL
pounds of hydrated lime in water at
time of using. Fill 200 gallon spray
tank three fourths full of water. Pour
"a gallons of bluestone solution into
the tank. stir the agitator and add the
lime milk slowly until a neutral solu-
tion is had. Test with litmus paper to
tell when the solution is neutral. Adj
ID gallons of glue solution. Measure
out IL gallons of the General Oh, m cal
Company's No. oil emulsion or a
corresponding oil emulsion. add little
water and STIR until emulsion is starte
as shown by the mixture turning
milky. Pour into the spray tank ard
add water to make 2o0 gallons. The
sgitator must be kept running during
the " hole rocedure. The spray should
be applied as soon as prepared.
The above are the proportions for
200 gallon tank. In making stock so
utions for a days spi piaying the quaint
ties given can be multiplied by In
number of tanks required. The strength
Of the Bordeaux can be varied as
deemed reces sary. The amount OF
copper sulphate in the above formula
s the same as in the ordinary $50.
1t is necessary that the Bordeaux solu-
tion be neutral and not alkaline as
ordeaux is ordinarily made This is
determines by adding the lime milk
slowly allowing the lime milk and cop
Der solution to be we'll mixed and
testing with blue or red Itmus paper
to determine when the neutral point IL
reached. If no rain follows the appli-
cation of Bordeaux oil emulsion spray
for "a hours the spr ay dries thoroughly
and stays -on the bark of the trees
throughout the season and is effective
against anthracnose development after
the fall rains begin.