The watchman and southron. [volume] (Sumter, S.C.) 1881-1930, 1913-01-22
INSECTS INJURIOUS TO STORED
CORN.
Clemson College Extension Work
Nouth Carolina Experiment station
Press Bulletin IU2.

ne insects found in stored corn are
numerous, but among them are only
two great dcstroycrs which REQUIRE So
rious attention. These dcstroyers arc
the notorious black rice weevil and
the grain moth commonly known as
grain fly The life history and
habits Of these two champion corn
pes's are very similar and the treat
ment effective against one is also ef-
fective against the other as we'll as
rats mice and other insects present.
The full grown females Law eggs
which hatch into grubs. When the
grubs become full grown they harden
the body skin, turn brown or black
and become practically motionless.
This is called the pupa stage. From
this pupa stage the full grown males
and females emerge. The time ordi-
narily rquired TO pass from egg to full
grown insects is about six weeks.
Let us Destroy Them.
First. Clean the corn crib before
putting in new crop. After cleaning
provided the crib is separate from 9TH
er buildings, fumigate with sulphur
at tn rate of 1-2 pounds TO 1000 cu.
1T. Of space. Us an old iron kettle and
the sulphur can be fired by pouring q
little alcohol on it before lighting il.
Instead of alcohol, you can use hot
embers Int remember that you do not
have your head above the kettle when
you put the embers in. The writer
has had experience and urges that
this precaution be observed. You
probably doubt the effectiveness Of
this fumigatiOn because your crib is
an open one. Tighten the crib; the
corn is worth preserving. Do not ex-
pect that you can control the weevn
successfully in an open crib.
Second. After your crib is clean
and tight, put in your new crop and
when it is all stored fumigate twice 10
to II days apart as follows:
Beginning at the back of the crib.
pour carbon bisulphide as uniformly
as possible over the surface Of the
corn, at the rate of to pounds per
1000 cubic feet of space. The gas
given off, being heavier than air, sinks
down through the corn and penetrates
to the weevils. Carbon bisulphide is
not dangerous to apply when care is
taken TO breathe as little Of it as pos
sible and TO apply it as quickly as
practicable. In the average crib con-
fine the gas as long as possible; in
practically every case it will have en-
tirely escaped within As hours. Fu-
migation with this strength of the
liquid in no : ay Injuries the germina-
tion of tMe corn or the feeding quail
ties of the corn so treated.
The fumigation does not kill eggs
or pupae; it kills only the larvae and
the full grown weevils or flies" and
should therefore be repeated in ten
or twelve days.
a brand commonly used and known
as "Fuma" is manufactured and sold
by the Taylor Chemical Co, Penn
Yam, New York. The p.ice is 10
cents per pound, I. o. b. at the orig
inal shipping point. The freight on
one so lb. drum from New York
to Clemson College is SIPS which
would make so lbs of carbon bisuI-
phide plus freight, cost u 1-2c per
pound. The drum costs $3.50 and can
be returned. Carbon bisulphide can
be shipped by freight only. The tank
should be kept in a cool place and
the plug kept screwed tight when not
in use.
Carbon bisulphide is very volatile;
that is it converts to gas rapidly when
exposed to air at moderate temper
ature. The liquid and gas is highly
inflammable and when set on fire is
explosive. This, however. should not
frighten anyone intending to use
because il is merely necessary To keep
away fire of any kind when using it.
just as YOU would when handling gas
oline or gunpowder. Its presence is
easily detected by its characteristic
rotten egg odor. If 80 pound drum
is too much for You, then maybe YOU
can form a club and your neighbors
will use part of it, If possible put a
sheet of tin around each foundation
pin of the crib, to prevent rats and
mice from getting into the corn
Send for Bulletin l7o of the South
Caroln Experiment Station.
y. +. Conradi, Entomologist,
). g. Experiment station.
Chronic Constipation Cured