The Caldwell tribune. [volume] (Caldwell, Idaho Territory [Idaho]) 1883-1928, 1914-05-08
SUGGESTIONS ON
CODDuING MOTH PEST

Professor T. H. Parks of Boise, is
distributing cooling moth cages and
in return asks orchardists to careful
" watch and make note of the earliest
day first codling moth energies, also
the latest day. AS Professor Parks
has many duties to attend, he advises
that each orchardist should make a
cage for himself. AS material, use
common wire window screen, a con-
venient sized cage will be eight inches
in diameter, and twelve or fifteen in
ches in length. In these cages the
orchardist should place the larvae OF
the codling moth, also place leaves, or
a bit OF cloth cover for shelter, and,
when the moth has actually emerged,
it would be we'll to add twigs of ap-
pie bloom.
Disposition of the cages.-Place in
such position in the orchards as to
give an average temperature. 1t is
we'll to throw weeds over the cage to
partially hide, lessening the power of
the sun. 1t should be noted that the
time of the appearance of the codling
moth depends on climate, season, ele-
walton, earlier in valley than on
benches or hills, and governed some
what by the position and conditions in
the orchard. Since ten cents worth of
material will mage cage, it is we'll to
have two or three of them under var
led conditions in the orchards.
AS the larvae of the cooling moth
energies from an apple late in the fall,
it seeks place to winter with safety,
wintering as larvae or worms. This
larvae may winter under a bit of
rough bark on the trunk of tree, or
in any shelter hiding it from the birds
AS the larvae seeks shelter, it weaves
over itself web. Here it reposes I'm
til springtime.
The next step in time depends on
the character of the season, and on
the earliness with which its place of
concealment may warm up Depend
ing on the character of the shelter,
the date of pupation may vary fifteen
to sixty days, or more The next
step is for the larvae to change to the
pupae form, called pupating. In cool
weather it remains in this form for
twenty-one days, in the heated sum-
mer less time, and then energies as
a codling moth. The cooling moth,
male and female, fly at night aud
mate. Within four days of the emcr-
gence of the moth, egg laying COM
mences. Each female moth is re-
ported to deposite from one hundred
and fifty to two hundred eggs. These
eggs hatch in eight or ten days. Mr..
b F. Hurst of Boise, who has given
very careful attention TO the habits IF
the cabling moth, reports that the
larvae may feed one to two days on
the foliage before entering the apple.
Some Observers report thai. of the
:he hrst brood, or while the apple is
yet small, eighty per cent of tie lar
vac may enter the apple through the
calyx. Later in the season, as the ap-
pies are larger, many Of the larvae
enter the apple through the side, un-
der cover of leaf. or where two ap-
pies touch. Since a large proportion
of the larvae of the first brood are
likely to enter the apple through the
calyx, special effort should be made
to deposite some form of poison, per-
ferably arsenate of lead, in the calyx
before the calyx closes. This poison
lodged within the calyx may not only
poison the larvae of the first, but some
of the second brood, since the poison
remains in position to intercept the
larvae whenever it does enter.
A skillful orchardist does not spray
until after pollination has taken place,
and the major portion of the petals
have fallen. In the Yakima district
in a favorable season, the rule is to
begin to spray when eigth-tenths of
the petals have fallen. After the petals
fall there is usually FIVE to seven days
time in which to spray before the
calyx so tightly closes as to prevent
the Judgment of the poisonous spray.
This first calyx spray should be with
high power pressure pump, aiming
to force the liquid into the lower por-
ton of the calyx. Since the eggs of
the cooling moth have not yet been
deposited and may not be deposited
for some weeks after this spraying,
the object of this first spray is to
securely lodge this poisonous liquid
in the calyx of each and every apple
of the tree.
The second spray.-Careful obser-
vers, like Mr.. B. F. Hurst note that
most of the eggs of the cooling moth
are deposited on the leaves, and that
the young larvae may feed little on
the leaf on its way to the apple. This
gives an opportunity to intercept the
larvae by the second spray, which
this time should be fine mist, coat.
ing. the under and upper side of the
leaf
To determine the best time for The