Angoumois Grain Moth. 19 
useful in killing the moth in grain stored unthrashed. It is not 
recommended for the treatment of thrashed grain in bulk. 
Thrashed grain in 
bulk should be fumi- 
gated with carbon 
disulphid. This gas 
is heavier than air 
and is a standard gas 
recommended to kill 
moths in grain stored 
in bins, tight rooms, 
etc. It will not injure 
the seed for planting 
if the seeds are thor- 
oughly dried when 
fumigated. - Informa- 
tion regarding hydro- 
cyanic-acid gas and 
carbon disulphid is 
given in Farmers’ 
Bulletins 699 and 
799, which may be | jc eeO aa | 
had free by writing IFrg. 16.—A modern galvanized-iron corncrib planned and 
to the Secretary of erected by a progressive dairyman of Louisiana. Soft 
; white dent corn has been kept in this crib in perfect 
Agriculture, Wash- condition for over a year. Weevils breed in such cribs 
= as fast as in any, but are easily killed by fumigation 
ington, D. C. with carbon disulphid. (Photograph by Jones.) 
me 
HEAT. 
The average farmer is not equipped to use heat in controlling the 
Angoumois grain moth. Millers and grain dealers who have dryers 
can heat wheat to 120° F. Jf grain is heated to a temperature of 120° 
F., all insects in it will be killed. Heating to 120° F. will not injure 
its germinating power. 
PARASITES. 
Parasites’ and a mite® often come to the farmers’ aid and kill 
large numbers of the moth. Ordinarily, however, they do not become 
_ of service until the moth has caused much damage. It is not prac- 
tical at present to depend upon parasites to reduce losses in field or 
storage. 
7Pteromalus gelechiae Webster. 8 Pediculoides ventricosus Newport. 
