The Manchester journal. [volume] (Manchester, Vt.) 1861-current, 1916-01-13
When TO Examine Cattle


animals from the irritation and pre-
vents the enlargement Of the em.
holes. While this practice is not ap-
plicable TO ranch conditions il is easily
put into effect on small farms and in
dairies In the Southern States he
herds should be gone over early in De-
cember, and about twice later at
monthly intervals In the Northern
States the extraction should be begun
six weeks 20 two months later. II no
grubs are allowed TO drop 10 the
ground and reach maturity the num-
ber appearing in cattle in subsequent
years will be materially reduced, and
if extraction is followed up for several
years almost complete eradication will
result. OF course it is important
where possible to get concerted action
among the stockmen in the destruction
Of these pests.
In extensive experiments along this
line in Germany it was determined
that the cost of removing all Of the
MARBLES from the backs of cattle dur
ing one season was about three cents
per head. In this case men we're en-
ployed especially to do the work. 1t is
possible for practically every farmer
and dairyman in this country to ac-
complish this work without material
expense or loss of time.
Cow-Testing Associations Asked
To Aid
1t is suggested that in those com
munities where cowtesting associa-
tions have been formed .he men
charged with this work could in many
cases devote part of their time to edu
eating the stock raisers as to the
losses caused by OK MARBLES, and to
aiding the members of the association
in destroying the pests.
Use of Arsenical Dips
Investigations conducted by the De-
partment indicate that eradication al
so may be accomplished by the use of
arsenical dips, which are extensively
employed at the present time for de-
stroying cattle ticks. These investi-
cations are being extended, and ex-
perimental work is in progress which
it is hoped may establish effective and
practical methods of destroying
warbles. The arsenical dip appears to
act not upon the well-developed grub
beneath the skin, but upon the eggs
or the newly Matched larvae, probably
tic latter. 1t is not unlikely that the
destructive action of arsenical dips up
on warbles is more or less dependent
upon the fact that arsenic is stored
up in small quantities in and upon the
skin Of cattle which are repeatedly
dipped in arsenical dips.
Examine Cattle Imported from Other
States for Signs of Marbles
The discovery of the European OK
warble in certain sections Of the North
makes this pest significant to northern
cattle raisers and to those who import
pure-bred or other cattle from these
sections. During the winter and
spring months considerable numbers
of pure-bred livestock are purchased in
the Northeastern States and are ship
ped to various parts of the country,
1t is urged that all animals thus trans
ported be examined by the purchasers
and all grubs destroyed during the
spring and summer. Animals pur-
chased a. any season of the year may
harbor these pests. In the winter and
spring they will be found beneath the
skin on the back, while at other times |
Of the year the grubs are elsewhere in
the body Of the host, and it will be
necessary 20 watch for the appearance
Of these grubs during the following
season. In those States in which reg
stration Of all imported animals is
required il would be comparatively |
easy for the authorities to follow up
such importations and see tha. any
warbles are destroyed.