Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1904-01-28
THE COOLING MOTH.

Fortunate indeed is the orchardist
who does not know this insect from ac-
tual experience, yet there are portions
Of the northwest where II is yet UNI
known.
Tho insect Is the common worm Of
the apple and pear and In the orchard
may be easily detected % by the pale
biownish castings which are thrust out
of It's burrow ana then cling TO the
side of the fruit and t2l from the fact
that many OF the injured fruits fall
prematurely to the ground.
Description and Hablts-The larvae Is
the young OF small purplish brown
moth, which measures a little more
than half an inch from tip TO tip. The
iIst moths usually appear shortly af-
ter the apple trees are In bloom, but In
the warmer regions they appear before
the blossoms open. The females depos.
pies one or two In a place, and are
capable OF laying 10 TO 30 eggs. In
ncm six to eight days these eggs all
hatch into minute larvae or worms.
which soon burrow into the young fruit
usually at the blossom end, Reaching
the core when half grown the larvae eat
out an irregular cavity, and sometimes
castings are thrown out through the
hole by which the worm entered. or
when the larvae IL full grown and about
to leave the apple. through horizontal
hole bored 10 the side These castings
are Of a rusty reddish color and make
the wormy apple quite easy TO detect
NJ this time In about three weeks the
larvae reaches It's fun size and then
leaves the fruit either by crawling out
Of the hole aud thence on to the tree or
by dropping TO the ground on n sllken
thread which II spins many Of the In.
jured fruit drop to the ground and not
rarely this happens before the larvae
has attained Its full growth. In such
case the worm crawls out Of the fruit
almost Immediately.
The larvae seek for protected places,
such az crevlces In the bark or cracks
In the soll and there spin thin cocoons
In which they soon change TO mrown-
ish purple In from u 20 81 days the
adult moths emerge and few days later
eggs are laid from which second brood
Of larvae develops.
The larvae OF the second brood are
peculiar In that they usually enter the
mutt from the side, fayorte place be.
Ing where apples touch. In most Sec
tl0ns this second brood Is quite distinct
from the first In time Of appearance,
ana tho larvae for the most part hiber-
nate over winter In the warmer val
legs, however, there IL n continuous
succession Of individuals from tho first
to the second broods, and even until the
found In every stage, This has usually
been Interpreted as indicating the ex-
lstcnce Of three or more brOOds.
The larvae Of the last brood I'm tho
year hibernate over winter In silken co.
coOns, and change into pupae the fol-
lowing spring The moths are rarely
seen unless specially looked for or rear
al "a. Ni.s
In tho evening, and are not attracted
TO lights,
Spraying with the arsenicals Is by far
the most satisfactory means OF COM
batting this insect. The most import
ant application IL the first which should
be applied ms soon Ms the petals fan
from the blossoms, bur not before A
prime object Is TO have the blossom
enc. OF tn Q young pear or apple filed
with the poison, as this Is where the
caiyx cup at the blossom end closes,
which IL shortly after the fruit sets.
Seine growers spray the solution with
considerable force, claiming that II
yields better results by getting more
poison In the calyS cup A second
er, seems always profitable, The value
Of either " these sprayings may be
completely destroyed by heavy rains
following the application, In which case
thcy will need to be repeated al once.
These two spraylngs are all that are
required In the greater part Of the
coast region and In the inland uplands.
In the warm Inland valleys however,
more spraylngs are required Different
growers apply these later spraylngs al
somewhat different dates, Tho third
spraying Is commonly given about the
10Th or 18TH OF July the other at In
teryals Of three weeks. the last In Sep.
TENDER
In addition 60 spraying, some growers
especially In the warmer valleys use the
banding system as an additional means
Of protection, In this practise advantage
" taken of the larvae seeking shell.
tered places In which 10 pupate The
simplest way Is TO fasten y strip OF purlap