73 
fested when brought in from the field, it should at once be fumi¬ 
gated with carbon bisulfid in a room especially constructed for the 
purpose in a manner to be described later. In the management of 
mills, returned bagging, second-hand machinery, and the like, 
should be carefully inspected or, better, regularly fumigated. 
The more important special measures which, used alone or in 
combination, may prevent infestation by granary pests, may be 
described as follows. 
1. Small grain should be threshed and stored as soon after 
ripening as possible. Wheat should be harvested and threshed 
directly from the shock if practicable, but if stacked, should not 
stand in the field longer than is absolutely necessary. 
2. The place intended for the reception of a crop should be 
thoroly cleaned out some time in advance, and if there is reason to 
suppose that it has contained granary pests, it should be fumigated 
with sulphur. Complete protection against weevils requires that 
rooms for grain should be made tight, with windows screened and 
doors close-fitting, and also that they should be cool and dry. With 
proper care and some additional expense, any such structure can 
be made gas-tight and suitable for the fumigation of its contents 
with carbon bisulfid, but the need of thoro ventilation should not 
be left out of account. 
3. If it were possible to dry grain from the field artificially at 
a temperature of 125 0 F. for four or five hours, all insects would 
be killed and the grain could then be stored in a thoroly clean and 
tight place, and safely left until needed for shipment or use. Corn 
which has been shelled dry and sacked is much safer than that left 
on the ear, whether with or without the husks. Grain stored for 
seed should be dried artificially, since it not only keeps better and 
germinates more generally, but it is also less liable to be eaten by such 
insects as devour the kernel. 
4. Farmers, seedsmen, and' millers should, in buying grain, 
make sure that it is free from insects. 
Treatment of Infested Grain 
When a mill or storeroom full of grain has become infested 
with granary insects, an inspection should first be made as to the 
nature and extent of the infestation. Much time and money may 
often be saved in this way, for the trouble may prove to be of 
slight practical importance, and capable of being remedied by some 
simple and inexpensive operation. A seed-corn warehouse, for ex¬ 
ample, may be so generally infested by several insects that it would 
seem that serious damage must have been done, but it may be found 
that the more abundant of these insects are feeding on dust and 
rubbish derived from the grain, and that only one of them is 
actually injuring the kernels; and a thoro examination of fair 
