The daily star-mirror. (Moscow, Idaho) 1911-1939, 1923-05-23
The CRDLING MOTH
ORCHARDS WORST ENEMY

The following regarding the cod
ling moth is taken from a paper is
sued by M. L.. Dean, director of tn,
bureau of plant industry:
One of the most serious pests will
which the apple growers of Idaho ar
obliged to contend is the cooling
moth.
In all apple producing sections the
losses in 1922 were exceedingly heavy
and the growers should put forth an
extra effort to control this pest this
season. 1t can be done if thorough
p~ainstaking efforts are used in apply
ing the a~rSenate of lead sprays.
We speak of the codling moth but
it is the larvae, the worms, which
hatch from the eggs of this small
beautifully marked brown moth which
causes the trouble, hence We direct
our fight against these worms. In
order to properly direct control mea-
sures it is necessary hat we under
| stand the life habits of this pest.
The moth spends the winter in a
cocoon as a worm. These worms
change to a pupae then a moth in he
spring about the time the apples come
to full bloom. If the soil beneath the
trees and the rough bark on the trees
are carefully examined at this time
the empty pupae cases may be found.
The habits of the moth are such that
they lay the majority of their eggs
in the early evening e the tenn
perature ranges so degrees F.. and
warmer. The period OF egg laying
usually lasts four to five weeks and
reaches the peak about the first week
in June.
Hence the secret of control is to
spray with %sen of lead at the
Matching period, or in other words,
get the poison ~ the trees just the
day before they hatch, as this hatch
ing period covers the time from about
the first of June until the first of
October. Thorough, efficient, frequent
spraying is the only control method.
What to Spray With
I suggest spraying with arsenate
lead, eight pounds of paste or four
of dry to 200 gallon tank, be-
cause it is the recognized standard
used for that purpose. Some
growers use a larger amount, five J
to six pounds, but If this strength
IS thoroughly applied control is usu-
ally secured. Each year there are
,ther products recommended for this
Use, but let 1.-the other fellow try
new things"
To supplement the spraying cam
oaign for serious i~nfestations it is
wise to band the trees with burIap,
.overing a row d~iagona1ly through the
each way, and by examing
md watching the bands frequently,
any cocoon found, a care !
III check on the development can be
made.
The process Of careful and efficient
thinning of the fruit is one of the
essential aids to moth control.
The best equipment is none too
.ood. Every rover should own the
high-powered spray machine that
le can secure. 1t should be carefully
AIRED for, pump and engine kept in
God condition, hose strong enough to
AIRY 200 to 300 pounds pressure, all
ouplfngs tight and the best rods or
uns, depending upon the choice of
he operator.
Time to Spray
The time of the first or ca1yx spray
hould be determined largely by the
of the center blossoms of
ne clusters. The center ones uSu- I
lily come out first and are the first !
} close. The calyx spray should be J
pplied, after the blossoms are all out :
ut not until after the majority of I
lie petals have fallen from the bios }
,ms. Earlier applications are fa~al !
the bees that are working in the
OW0IS. At ILLS tl1uC liz CdlyA S0P Z
open and if the receptacle is filled
it'll the poison solution, which I
spraying will do, you will Z
It the worm before it gets the apple. )
he open period only lasts O 10 4
IL days, hence the spraying must I
!, done within thai time if the best ;
suits are secured. In seriously in \
sted orchards it may be advisable Z
apply a double ca1yx spray, the :
application following the first )
about a week. :
Cover sprays are applied to cover =
Ie fruit, and if it is kept properly =
ated during the growing period, \
orm free fruit can be harvested =
The first cover spray should be =
about 10 to FL days after HI y
.lyx spray, usually this is about h =
itching period of the eggs. 4
If weather conditions are favorable y
r moth development or if the or =
ard is seriously infested, a second a
yer spray should be applied in about =
to IL days. y
At this season of the year the fruit =
growing rapidly and the coating =
ay become thin OF broken so that y
e small worms may gain Gu =
ance into the fruit, hence due pre- y
ution should be taken to keep the Y
hit thoroughly coated. Z
Always keep in close touch with -
,ur horticulture ~1insnector, z x n
-oh, telephone No. 9138, in your dis y
let. They will fix the prope date =
spray and give other information y
pest nitro problems. Tr7 waa- ~
err conditions are such that the moth =
becoming very active and growers n
be on their tiptoes and ready q
ward off approaching danger. 4