Iowa voter. [volume] (Knoxville, Iowa) 1867-1874, 1872-01-18

our fault.
Among the destructive insects, two
of those most TO be dreaded at the
present in Iowa. are the Canker-worm
iAnieopterix Nernatar, of Lniomoi-
ogistsl and the Codling-moth lCarpo-
capasa Pomonella.)
Against the former, which in its
first onslaught, threatened the utter
ruin of many OF our finest apple or
cbards. various remedies have been
devised and practiced, which have In
the particular instances, been more or
less effectGal. These have been, ana
doubtless will continue to be, re-
ported for your consideration.
1t is to be regretted that some
means have not been devised Tor the
eytinguiShment of the whole brood
after their Information, and before
their transformation from the pupa
to the grub, or perfect insect. Ihey
hibernate in the ground under the
| trees In the orchard, from two TO 10uf
inches below the surface. FROM TINS
they are transformed into the perfect
insect very early in the Spring, or
rather. as fast a. the thaWing pene-
trates to their tabernacle. or winter
Quarters, from which time the female
/ teoins her work, embracing every
( favorable opportunity for ascending
| the tree and depositing her eggs.
/ In due season these are hatched into
,nyriads Of Canker-wOrms, which
not only eat the young. leaves ana
/ blossoms Of the trees, but lnfuse a
4 deadly poison still deeper than the
PARTS devoured, so as to present the
appearance OF fire having passed
/ over the eXtre mites Of the branches.
Can we not find some means OF
destroying the pupa while III the
ground, thus striking at the root OF
| the evil and at once eXtermlnatlng
the whole brood, and ending the
war which now has to be continued
frOrii wear TO year, doubtful as to
which party has the advantage III
! the fight?
/ rccolicct within two or three
wears 10 have seen q published re-
| mort. think from one Of the North
Eastern states, stating that III in one
or more orchards the Canker-Worm
had been completely subdued by
pIoughing the ground deeply, late III
| The Fail. ! thought after making an
examination under some large apple
I frees Oh the College Farm in the Fall
I Of 1870. where these worms have eX-
is9d in large numbers tor several
, wears, that this iuea was quite phiio-
/, .sOphical, though / have not lad an
opportunity 10 test 1t. ] fouhd the
Ichfysaiis as before stated, located
from Two to four inches below the
.uriacc. This therefore, / take it, is
their normal condition, or ordinary
lepth. II then by deep ploughing,
)r spadiug under, they could be
,urled eight or ten inches deep, could
hcv after their transformation into
ME miller, or moth, ascend to the
surface? lfnot, they must die there,
, without accomplishing their aims.
will remark too, in reference tOthls,
tlat i'm my Investigations, l found
I'm aperture from the surface OF
tae ground to the location Of the pu-
~. which ! supposed to be the open
mr. through which the larva de-
| I.scended to its winter quarters. May
, this not also be the passage through
which the moth ascends the surface
Oh his GRAND of destruction? Should
, it therefore be true that the moth
, needs this opening for the purpose
named, it is quite reasonable to sup
pose that according to the order OF
nature, if the aperture were closed,
or the chrysalis deeply buried by in
Iverting the soil with proper instru-
| bment, it could never, after its meta
Imorphosis, work It's way out. Nol
do | think, judging from the appear
, ance Of the insect, that we could ar
rive at any other conclusion, fol
/, while we must admit that it is q
| deXtrous climber, it has no particular
resemblance in its exterior structure
TO any insect or quadruped that has
! gained much celebrity for boring
through the ground.
AS this is one of the most impor.
ltant matters connected with orchard.
: ling and fruit-growing generally, and
: more especially in its relation to the
napple, which is our staple pomolog.
, Tical production, ] would urge the
: foregoing suggestions as well as the
general subject, upon your serious
Iattention, hoping that you will give
, lthem all the thought and investiga
f Ition which the circumstances require
! The Cooling moth, (Carpocapss
, Ipomonella) is another enemy much
: to be dreaded, and has for several
: Years been exceedingly prevalent
, The perfect insect begins its work by
, laying its eggs at theapeX or blossom
) end of the apple, which is there
{ hatched out, and the larva, small
, white worm or maggot, makes it
| way to the core. AS it grows larger
| il becomes flesh-coiored; and i'm three
, on four weeks, at the expiration OF
+ which time it becomes full size, il
, makes its egress by gnawing out
) through the side of the fruit. 1t then
J generally seeks the stem Of the tree
, Especially if the bark is rough and
loose, under which it hides itsel1
+ flOm observation. If the trunk OF
the tree be kept clean and smooth sc
: that it has no hiding-place there, il
will creep under amy covering tina,
5 may come in its way. This teaches
) MS first, the importance, not only OF
keeping the body of the tree clean
: and bright, but of working the