a re 
Angoumois Grain Moth. “7? 
of delayed harvesting, thrashing, and storing. The storing of wheat 
unthrashed in barns or stacking it unthrashed in the field increases 
the loss. Prompt harvesting, thrashing, and storing in deep, tight 
bins, or in tight sacks, is effective. Wheat should never be left spread 
in thin layers on barn floors except when too wet to store. Such a 
practice makes it easy for the moth to lay eggs on kernels. 
DRYNESS. 
It is stated that where practicable to store grain under dry con- 
ditions, the amount of damage done by the Angoumois grain moth 
Fic. 13.—A slatted corn crib. Such corn cribs are no protection from insects to corn 
stored in them in the extreme South. Corn stored in slatted cribs from Maryland 
northward is safe from Angoumois grain moth attack at least until the summer 
following harvest, as the cold of winter is usually sufficient to prevent moths from 
surviving the winter in slatted cribs. : 
will be reduced greatly. If the atmospheric moisture can be re- 
duced to 26 per cent or below, all infestation will be destroyed. 
FUMIGATION. 
If grain is found badly infested with the Angoumois grain moth 
it should be fanned and screened. Such treatment will remove 
about half of the infested kernels of wheat, but will not remove in- 
fested kernels of corn. Remember fanning only removes adult 
moths, débris, and light kernels. Zo kill the moth in the remaining 
crop the seeds must be fumigated or heated. The best two fumigants 
are hydrocyanic-acid gas and carbon disulphid. Wydrocyanic-acid 
gas is lighter than air, very deadly to man as well as insects, and 
