The Era-leader. [volume] (Franklinton, La.) 1910-current, 1916-08-17
THE HORRIBLY A DANGER
GUS PEST.
Irritating to Cattle, and Found to be
a Charlton Carrier-Destroy the
Egg or LarvaI Stage.

The horn.ay was imported frpm Eu'
rone and since its arrival in 1887, II
has spread all over the country
Entomologists, or those VINO make
study OF insect life, while
they may recommend some meas
nres to destroy the mature IN
| sects, usually try to find out how anu
! where they breed and direct thelr el'
forts at killing them in the lmmature
stages and so prevent their develop
ment, In fact, 1t is questlonaDlo
whether it is possible, by simply ae'
stroving adults, to keep pace WIN
their multiplication. On the other
hand, If these insects should be ue.
stroyed in the egg and larval' or grup
STAGES a material reduction in their
numbers might be brought about even
,f the adult flies themselves Should oe
loft alone. The important question
therefore is, where do these hornnles
breed? According to the best au'
thorities, this fly lays its eggs slns,s'
and usually upon their sides, on the
surface of wet cow manure. so lar
as I, known, they are laid upon no
other substance, and never upon olu
f dronnings. The moment the manure
j. is dropped, a swarm of flies dart from
tho animal to the manure and remain
there a few seconds, or minute al
The most, during which time many
eges are deposited. Egg laying IS
chiefly during daylight and most
abundant during the warmer morning
hours. After the larvae, or gruDs'
hatch, they descend into the manure
although remaining near the surface
The pupa, or dormant stage OF the
insect. Is found in the ground un
derneath the droppings. The time
which elapses from the egg to the
adult stage, or fly, is from aboucAtel
to seventeen days.
The fresh COW droppings, then, ar
:. the places on which these mes Ia
40 their eggs, and where the dlf1eren
IL stages of the insect develop until tn
'as full.aedged insect energies. The mos
ho practical method Of control, therefore
A would be the. direct treatment OF IN
manure to destroy the grubs and p'
M nae and so limit the number OF 1lle
coming to maturity; and one OF tn
best agents to apply to the fresh drol
ate n;ngs Is lime. This may be quit
the practical around buildings and yare
A. occupied by cattle, but somewhat II
"'' nractical out in the open fields ar
ranges. although it might be posslb
to carry out this method even und
IS such conditions, if the manure aroul
# in the places where cattle are IN u
habit of congregating, under sha
trees, and the like. AT best,
is a trouble, but it is not lpossit
'A'' to secure results without some tre
Bile, and if we ever expect toy redu
the numbers Of these pestiferous
sects, we will have to get after tn
breeding places and destroy thu
there. R
The arsenical solution used&n
dipping vats destroys large humb'
, no. of these flies, and there are nu
Der Of sprays used to repel tn
,ring from the animal, such as fish a
d.v coal oil emulsions, the various rel
~ lants on the market, etc. HoweV
=: none Of these will effectually era
- cate the horn-fy, while combinat
lore' Of both measures would no doubt
pup The most satisfactory results. In
news dition to it's irritating effect on I
, and tie, the horn-tly has been found to
other A carrier of Charlton infection.
It the w. H. Dalrymplt
,ause, Louisiana State Univers