The Dolores star. [volume] (Dolores, Montezuma County, Colo.) 1901-current, 1916-02-25

Specialists OF the department are
urging cattle owners. in the North as
we'll as in the South. to take steps to
| rid their cattle OF OK MARBLES or
wolves" the Importance of which to
the cattle industry has been generally
underestimated. Ok MARBLES are the
whitish grubs or maggots which de-
velop from the eggs deposited by GER
tain flies known as MARBLE flies or
heel flies, and which injure the hides,
| reduce milk flow and retard the growth
Of the animals. The maggots are COM
monty found Just below the skin on
the backs OF cattle in the spring. Their
presence is revealed by local swellings
about the size Of pigeons eggs. each
with a small central hole or perfora.
ton through which the maggot
breathes. from this hole the maggot,
when mature, energies to enter the
ground and change to the adult or fly
stage. When full grown the grub il
about three-fourths OF an inch in
length.
In the past trouble from the MARBLES
has largely been confined to cattle in
the South. but recently the bureau of
entomology has discovered that a sec
| ond species. heretofore not found in
this country but known to be even q
more serious pest in Europe than Is
our native MARBLE. has become well es.
tablished in certain districts in the
northern part Of the United States.
While 1t Is probable that this so-called
European OK MARBLE will not be of as
! great Importance in the southern part
of the United States as the species al
ready established. there is every rea.
son to believe that unless checked It
will become generally distributed
throughout the northern half Of the
country. This European species is
now generally distributed throughout
New York and the New England states
and a few specimens have been OBJ
tanned from western Pennsylvania,
western Maryland. southern Michigan,
eastern Iowa and Missouri. and west
ern Washington. Attention is also d.
| rected to the fact that this species Is
new generally distributed throughout
southern Canada. The department,
therefore. is calling attention at this
time to the danger Of spreading this
species promiscuously about the coun-
try, and is urging cattle owners to take
the simple means necessary to pre-
vent its spread.
Until recently MARBLES were not re-
! garded as serious even in the South.
because 1t was thought that the loss
they occasioned came principally from
tho don ~
this loss in the aggregate. however, is
! important. as hides show MARBLE holes
three to six months in the year. and
dealers pay from so cents to $50 less
! for hides that show even moderate
MARBLE infestation. In many cases the
scars left after the holes have healed
| cause buyers to cut prices consid-
erably.
The loss from the MARBLE, however,
is by no means limited to the holes the
maggots cut In the hides. Extensive
Investigations in Germany and Den
mark indicate that the losses through
reduction in milk supply in dairy cat
tie, the retardation of growth in young
! stock, and the loss Of flesh in all
classes of animals are twofold greater
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had been extracted showed q gain of
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