14 
HOUSEHOLD INSECTS 
Your method of control will depend upon the quantity of beans which 
you have. If you have only a few and they are to be used for food, place 
them in an oven with a temperature of 140° F. for one to two hours. If 
they are for seed, place them in an air tight receptacle, such as a barrel, 
covering with three or four thicknesses of blanket and pour into a piece 
of burlap on the top of the beans a teacupful of carbon bisulphide for each 
bushel of beans. Leave them in the fumes of the carbon bisulphide thirty- 
six to forty-eight hours. Remember that these fumes are explosive. 
If you have a large quantity of beans, which must be fumigated in a 
large bin or room, use three to five pounds of carbon bisulphide to each 
1,000 cubic feet of space. The carbon bisulphide unfortunately will not kill 
the larvae and pupae inside of the beans, and a second fumigation must 
be given as soon as the adult weevils begin to emerge, which will be within 
two or three weeks. I know of nothing which will penetrate the beans to 
kill these immature forms, except heat. Or, in the winter time, you could 
use the opposite, that is, cold. If the beans had been exposed to a temper- 
ature of 10 to 20° below zero for twenty-four hours all stages would have 
been killed, probably. 
If you are accustomed to storing beans over winter, you should see to 
it that your store room is thoroughly cleaned and fumigated before fall 
so that there will be no chance of infesting next year’s crop of beans. 
Infested beans and those suspected of infestation should be treated with 
carbon bisulphide as soon as the beans are gathered and infested beans 
should not be planted for seed. C. W. H. 
C 
