The Hood River glacier. (Hood River, Or.) 1889-1933, 1915-11-11
UNDERWOOD MAN
SUBMITS SPRAY DATA


W. M. Kolloek, an Underwood orch.
srdist, who owns one Of the largest
besring tracts in the neighboring dis
trict, submits for the consideration of
growers the following letter written
BY s. W. Foster, entomologist ard
manager Of the inseciicide department
of the General Chemical Co.:
The writer has recently returned
from the trip through the northwest
in which conditions were very thor
ougtly Investigated in some portion OF
each Of the larger fruit glowing sec
flons.
So far as the excessive amount Of
scab is concerned around Hood River
ard in the White Salmon valley, you
would think, TO hear the growers side
of the question. that there was abso-
lutely no method or means OF contlul-
ing apple scab. Blame is laid on every
material used for this purpose. The
materials most wide used aie tht
most generally abuse. Arourd Hood
River lime-sulphur solution failed, Bot-
oeaux mixture fail, d. Atomic sulphur
failed, soluble sulphur failed in fact,
so far Ms ! was at!s 10 learn every fna
gicide used failed in some iuslaneis.
On the other hand, all OF them gave
success under certain conditions. Al
least two men who carefully followed
directions and repeated the application,
when the spray was washed off by
rains, have good success. h. h. Shepard
had less than FIVE per cent scabby sp-
pies and P. S. Davidson less than 10
per cent. Both of these men kept then
spray machines busy last spring al
every possible opportunity during th.
Amy season. The real cause of ftiiure
think was the fact that less spray ing
was done this season than normally.
when as a matter of fact, two OF three
times the usual spreying was necess AIRY
for anything like satisfactory control.
MIR. Shepard averaged seven applica-
tlons aud Mr.. Davidson six. for the
control of the different orchard pests
during the season. The majority of
the growers put on pink spray OF lime
sulphur solution then, because the
weather was fair about blooming time,
and very little scab was apparent, the
fungicide was generally omitted in the
eaiyx spraying. About the time the 10
day application should normally have
teen applied, rain began and lasted foi
about three weeks: during this time
ideal conditions for scat development
prevailed throughout the valley W tn
the result that a very large percentage
OF the crop was infested. Then eruw-
srs began clan oring widely for all
kmds Of fuuei ides, which were used
more or less indescriminately aud. of
course, none WeieN satisfactory under
tnese conditions, because it is cut OF
the question to cure an apple all eany
Effected with seab fungus, without de-
stroying the apple. The average orch
ard in the Hood River valley received
only three appiica,ioLs Of fungicide last
spring, many of them getting oriy two,
when at least five were necessary. in
fact during the three or four weeks of
cold rainy weather, the trees should
rave been sprayed st least once a
week, unless the two early applications
had been most thoroughly applied.
Without commenting further, how
ever, on past failures, the writer would
suggest the following for your consil-
Grafton next yer.
Apply your winter spray of lime-sul-
phur s., luton. or oil. which ever you
prefer, then as buds begin to open and
tirst shaw pink, spray the trees with
lime sulphur solution al the rate OF
tour gallons to each 100 gallons OF
spray. Ii fair weather fellows until
petals are falling it will not tie neces-
sary to repeat this application. How
ever, If you have continual rain, !
would make second piuk spray.ns
just before The blossoms begin ops,.
Jog, using only three galloAs oi iiHt-
sulphur solution for each 100 gallu!s oi
spray at this time.
Then, just as soon as petals are
falling or at the time OF The usual ealyx
spraying ii the weather is 81 ur and
open, use IL TO II pounds of atomic
sulphur plus arsenate Of lead To each
100 gallons of spray. If il Is cold t d
/ tiny add one gallon of lime-sulpnui
solution in addition to the atomic sui
pnur and lead at the time Of this CALM
praying.
ADout 10 to IL days later, If you
have any such season as the last two
,eals have beer. repeat the applica
ton with atnmic suiphur and lime-sul-
ptur solution.
Then, about 80 days after blooming,
II is time fOi the second coulihg moth
spraying and also time for the next
spray for scab control. At this 'ine
the weather in your section is liable 10
he quite warm. and il such is the case
ii would probably be desirable to use
only 10 pounds of atomic sulphur and
nc lime sulphur solution for each 100
gallons of spray.
Then, with your last codling moth
spraying in August. use either atomic
sulphur or bordeaux mixture, depending
on whether or not you have any an.
Ihrscuose Infections. Bordeau mixture
will lie safe al this August spraying
and will, of course. be more effective
IN anthTHenuse control than the sulphur
We went into this subject very thor
Oughly at Hood River with the resul:
that we are convinced at least five ap-
plications of some good fungiciie will
be necessary to control scah under such
as prevailed last spring.
This question will probably be dis
cussed from many angles at tie meet
ing Of the Horticultural society al Spo-
kane N vember Is to 20 If You hap
pen to be on hand at that tine you will
ptobshiy near several volltys fired ut
every man who ever suggested any
treatment for seab control.