The Hood River glacier. (Hood River, Or.) 1889-1933, 1906-02-15
Philander. Simpso

A complete metamorphosis, that Is
from moth back to meth again, is from
30 to 81 days, great many claiming
so days average In summer. So about
so days after the first moths appear
watch out for the second and get your
spraying done in time for the worms,
which will begin to chew in from 10
to 10 days.
Material.
think all those present who used
Swift's arsenate Of lead last year feel
sufficiently satisfied to be justified in
using it again. The fruit growers of
Pajaro Valley, under direction of the
experiment station of California, spent
S35, 600 to find better spray than
Paris Green and one that would not
turn their foliage. Although they
tried every known spray they found
that Swift's arsenate Of lead gave the
best satisfaction. Colorado also had
good success. In fact have yet to
hear of grower who used it that is
dissatisfied. Ii there is any one OPP
posed to it let him speak out and give
his objections when | have finished
Hood River used about one. half
pound of arsenate of lead for each
tree for the season. Swift's direc-
tions are for the first spray, two aud
one half to three pounds for 80 gal
Ions; for the second, two to two and
one half pounds, for the third one and
one-half TO two pounds, and the fol-
lowing sprays one to one and one-half
pounds for 80 gallons of water.
Now am up against the real thing,
when and how to spray. AS Prof. X.
d. Ball of the experiment station, Lo-
gan, Utah, has spent seven years on
this work, m going to tell what you
he said, because he has given the best
talk, backed up by statistics, that
have ever heard. First let me tell you
he selected the wormiest orchard in
Utah, and made his comparisons on
the same variety, with about the same
number OF apples on & tree, because
comparisons II ust be made under sim
liar conditions.
Prof. Ball said substantially as fol-
lows:
In Utah unsprayed orchards have
averaged a worm to each apple.
Many problems remain to be solved
before we can say with certainty Just
what Is the best method Of controlling
the Goblin moth under the varied con-
ditions in which it is found.
The Utah ltation concerned itself
with three questions:
First, what is the relative value of
early and late spraysY
Second, what is the relative of each
of these early spraysY
Third, how long does the value of
the early sprays last, or in other
words, do the early sprays kill any
worms In the second broodY
In order to get these exact results
every apple that set ON tree was
counted and examined. In this ex.
pertinent this was done on GA trees av-
eraging 5000 apples each. For this
work it was also necessary to separate
the damage of the first brood of worms
from the second, which was done by
counting every wormy apple on the
trees Just before the second brood
began its work. Three early sprays
we're tested by varying the order of
the sprays In six different ways as the
following remarks will show. The
first spray was applied just before the
blossoms had fallen, and the second
ten days later and the third fifteen
days after that.
Results of the First Brood.
Trees that had only the third spray
we're as wormy as the unspIayed trees.
Trees that had only the second spray
had l5 wormy apples, or 70 per cent
worms killed. Trees that had only
the first spray had wormy apples, or
SO per cent of worms killed. Trees
that had the first two sprays had
wormy apples, or "a per cent of worms
killed. Trees with three sprays had
only wormy apples, OF SO per cent of
worms killed. These results are bet
ter shown in the following table:
Times Wormy Worms Per
sprayed. apples. killed. cent.
600 72 % 0
0l0 is 81 70
100 8 "a 80
nm 40 OA