The watchman and southron. [volume] (Sumter, S.C.) 1881-1930, 1908-11-18

seed where the young larva eats tho
starch; when full grown ii changes to
the dormant or pupa stage, from
which the full grown weevil emergas
and works its way out to lay the eggs
for another brood. The time from egg
laying to full grown weevil requires
about e,x weeks.
The life history OF the moth Is SIM
Tar to that Of the weevils, except that
the eggs are not laid inside of the
seed.
The methods that control one will
control the others and as the farmers
are at present looking principally for
a method to control the pests in corn
already in the crib the carbon bisul-
phide method is here discussed.
Carbon bisulphide, sometimes called
high life" is q colorless liquid with
a strong disagreeable odor. 1t vapor-
ICES rapidly at ordinary temperatures,
is highly infiammable and when ignit-
ed is explosive. This may appear
dangerous but it is not IL you keep
away fire or any kind whether flame,
stove, lantern, embers. lighted pipe,
cigar or any other means for convey
ing fire Of any kind. This chemical
is widely used at present. people OBJ
serving the cautions given above II
may be purchased at any drug store
or chemical wholesale house at about
10 cents per pound. This liquid and
vapor coming from it is heavier than
air and will sink. Therefore the ap-
plication is made at the top OF the crib
and not from below.
Assuming that the CRIB is moderate
ly tight it is used at the rate of one
pound to every 100 bushels of grain.
1t may be poured In several shallow
vessels and these set in various place
over the top Of the grain or it may
be applied by sprinkling 1t like water
over the surface. In tight bins the
sprinkling method is convenient and
effective. but in open. leaky bins the
vessels are recommended.
When the bin is open it should be
made tight IL possible. In case Of log
cribs this may be accomplished by
means of canvas tackled over the
walls. Assuming that a farmer desires
to treat an open crib the following
method Is suggested.
Instead OF sprinkling the chemical
over the surface or distributing IL in
shallow vessels 1t Is poured into large
bottles with narrow necks and these
are buried in the upper surface OF the
grain near the middle. leaving them
uncorked. The liquid will escape slow
ly killing the insects nearer the CEN
ter while those near the walls may es-
cape to the outside Of the building.
The writer has frequently witnessed
this when fumigating log cribs. The
liquid should be used at the rate of
two to three pounds per 100 bushels
and when the insects escape many of
them may be trapped by corn placed
in different places about the building
for this purpose. Later this corn may
be fumigated like seed grain described
below.
Where only a small quantity If
grain is to he fumigated. such as seed
corn. it may be accomplished by pour
ing it in a coal oil or whiskey barrel.
Such a barrel will accommodate about
three bushels. Three ounces OF car
bon bisuphide is poured over the sur
face and the barrel tightly closed for
twenty-four to thirty-six hours. The
opening OF the barrel may be made
perfectly tight by covering it with sev-
eral burlap bags weighted down with
boards. A permanent covering for
this purpose may be made by heavily
painting a piece Of canvas Of proper
size. This is laid over the opening
and a hoop dropped over the top Of
the barrel will hold it firmly IN posi-
ton.
The next article will consider other
methods employed for controlling
stored gain fnsects.-Clemson College
Experiment Station.