The Hood River glacier. (Hood River, Or.) 1889-1933, 1920-02-12
DIR. MACRUM GIVES
FORMULA FOR SPRAY

DR.. c. A. Macrum. former commis-
sioner Of horticulture for the Fourth
Oregon district, in his report 10 the
State Board Of Horticulture last year
gives a formula for a spray that he
has tested on his Mosier ranch and has
fOuld d effective in eliminating numer-
Gus sprays and resisting action Of
spri lg rains.
NJ. Mscrun in his report saws
| have been much interested in the
prol lem Of reducing the number Of
spraylngs necessary for scab control
ana also developing a spray which
would resist the action of spring rains.
IL occurred to me that a combined BOr-
deaux oil emulsion spray. applied as
the buds are opening. before the bios
sons appear, would control scab, San
Jose scale, the aphls. leaf roller, red
spider, curl leaf Of the peach, and the
copper would be present to prevent the
ravages Of the anthracnOse spores
when the rains come in the fall Of the
year.
| was unable to find that the COM
binatiOn mad been made or used.
wrote to Prof. Foster of the General
/ Chemical Company and requested that
+ he make the combination If he did not
! already have a formula at hand Prof.
/ Foster replied that he did not recall
+ having seen 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 cylindrosporum. 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 u pounds of com
mon glue in Il gallons of water, slack
4 II pounds of lime, or stir II pounds of
i hydrated lime in water at time of us
I ing Fill 200 gallon spray tank
three-fourths full Of water Pour "a
gallons of bluestone solution into the
tank, start the agtator and add the
/ lime milk slowly until neutral solu-
tion is had. Test with htmus paper
/ to tell when the solution is neutral.
4 Add II gallons of glue solution. Meas
{ uiE uub IL Sdiloi5 VI tHS nGlitIdl
/ Chemical Company's No. oil emul.
sion or a corresponding oil emulsion.
add little water and stir until emul-
sion is started as shown by the mix
ture turning milky. Pour into the
spray tank and add water to make POO
gallons. The agitation must be kept
running during the whole procedure.
The spray should be applied as soon as
/ prepared.
the above are the proportions for a
200 gallon tank. In making stock So
lutions for days spraying the quanti-
ties given can be multiplied by the
number of tanks required. The
strength Of the Bordeaux can be varied
as deemed necessary. The amount Of
copper sulphate in the above formula
is the same as the ordinary &C 80. 1t
H is necessary that the Bordeaux solution
/ be neutral and not alkaline as Bor-
deaux is ordinarily made. This is de
termined by adding the lime milk
slowly allowing the lime milk and cop
per solution to be well mixed and test
/ ing with blue or red litmus paper to
determine when the neutral point is
reached. If no rain follows the appli-
cation of Bordeaux oil emulsion spray
! for "A hours the spray dries thoroughly
and stays on the bark of the trees
/ throughout the season, and is effective
against anthracnose development after
/ the fall rains begin.