Daily capital journal. (Salem, Oregon) 1903-1919, 1919-04-10

,mereial preparations as vel as with
the home made emulsions. For the
combination sprays Of oil emulsions
land nicotine solutions, the nicotine
should be added last. that is, afte, che
loil emulsion has been diluted to the
desired strength. These solutions
should not be mixed together without
first diluting enc OF them.
This concentrated emulsion viii cost
the grower about cents a gallon, as
most of the various distillates used for
spraying cost from to 10 cents a
gallon in drum lots and home made
soap costs about cents per pound.
Experiments conducted thus far in
dieate that success is more uniformly
obtained BY using an untreated raw
diStilate 30 to "a degrees Beaume
with comparatively high flashing
point.
II was found that fruit from spray
ed trees was nearly free from scab, was
larger. and on account of yield and
quality showed a net profit Of Sl21 "A !
per aere over the non-sprayed. Simi |
lar results followed the use Of spray |
in pear and cherry orchards.
Recommendations
Spraying is by far the most salts
factory means for controlling the pear
thrips on all classes Of decidu0us /
fruit trees. However, to spray sue
eessfully involves an entirely differ
ent conception of the operation than
as ordinarily praetieed against other
orchard insects. Only the most eff
eient spray materials should be used,
the combination of distillate
oil emulsion and tobacco extract or
distillate oil emulsion and nicotine so
lutions. The spraying must be thor
oughly done and put on the trees when
The thrips appear in numbers, not wait
ing till many buds have been destroy
ed 1t is strongly advised to use pow
,r machines, and growers are urged to
use them for all the spraying. and to
have platform elevated over the
ank so that one man can thoroughly
trench the tops of the trees. IL is
absolutely necessary 70 use high pres
urc-from $50 to 200 pounds and
,nly angle nozzles should be employed,
md these must be held close 10 the
lud clusters to force the spray direct
y into the nds of the buds. This is
absolutely necessary to secure good
penetration and get satisfactory re-
ults. Plenty Of material-three TO
i've gallons per tree for pears, de-
ending on the size Of the tree should
e used; more liquid is required for
lrge prune trees; large cherry trees
nay require seven to eight gallons per
rec for satisfactory results. Only
wo rows should be sprayed at time,
sing three men, one on the tower to
pray the tops Of the trees, thus reach
ig all buds pointing upward, and two
len on the ground Gone to each row.
D spray the lower buds and those
Ointing downward or laterally.
Timing the Application Method
The spraying must be done on time
nd for the best results all the trees
iould be treated within a few days.
uriug the season Of 1910 moro Of the
allure to get satisfactory results was
ne to latcness of application than to
ny other one cause. Thrips were in
lc trees and in great numbers be-
re many Of the growers purchased
eir spraying supplies, and in many
.ses half the buds were entirely de-
royed and the others badly injured
fore the trees had been given even
G first application. The growers
ould have everything in readiness,
materials on hand, concentrated
lulsion made up and spray machinery
perfect working order by the first
March, and have all other orchard
,rk in such shape that when the
rips appear in numbers the spraying
ly be done at once and before the
DIS have been seriously injured by
e feeding Of the adults The grow
should have enough spray machines
cover the orchard quickly. At least
G good power outfit is necessary for
cry 30 acres Of orchard.
Schedule Of Applications
In badly infested orchards three APP
cations are necessary. Two Of these
rawlings should be directed against
: adults and one against the larvae,
d to obtain satisfactory results must
timed properly.
First Application
The first spraying should come as
IN as the thrips can be found on the
cs in numbers. about March lst.
Second Application
The second spraying, which is also w
+ adults, should come four to ten
Us after the first, depending some
at on variety Of fruit stage Of bud
vclopment Cnd tapdty of amer.
nee of thrips from the ground. On -