Weevils in Beans and Peas. 27 
food. The disagreeable odor passes away after seeds fumigated 
have been aired. While carbon disulphid has become a standard 
fumigant and has been used for years without trouble by many 
individuals and firms, it is always timely to call attention to the fact 
that the gas is explosive and inflammable if fire is brought close to it 
during fumigation. By fire are meant even a lighted cigar, lighted 
lantern, or the spark from an electric fixture. 
Seeds to be fumigated should be placed in an air-tight container. 
This may be a tin pail, wash boiler, barrel lined with heavy paper, 
galvanized-iron garbage can, or other receptacle, or a specially con- 
structed fumigation box or room, according to the amount of seed 
to be fumigated. One of the simplest satisfactory containers for 
fumigation on a small scale is a water-tight barrel. The tighter the 
receptacle the better the results. Satisfactory results can not be se- 
cured if fumigation is attempted in a room full of cracks. 
Carbon disulphid should be used at the rate of from 4 to 20 pounds 
to each 1,000 cubic feet of space to be fumigated, the amount to be 
used varying with the tightness of the container and the temperature. 
The liquid should be poured over the top of the seeds to be fumi- 
gated or poured into shallow dishes set upon the top of the seeds. 
It quickly vaporizes, and as the gas is heavier than air, it sinks to 
the bottom of the container, filling all the air spaces. Fumigation 
should continue from 24 to 48 hours, although most of the actuai 
killing is done during the first 6 to 8 hours of exposure. It is always 
better to use too much rather than too little carbon disulphid. 
Beans, cowpeas, and peas can be stored and fumigated conveniently 
in water-tight barrels. These should be filled to within a few inches 
of the top with seeds. In fumigating, pour one-half cup or more of 
carbon disulphid on the seeds and then cover the top of the barrel 
with a double thickness of heavy wrapping paper tied tight around 
the top, or several sacks weighted down with boards. A wooden 
cover is also useful in keeping in the fumes. 
Fumigation with carbon disulphid to give the best results should 
be carried on at or above a temperature of 75° F. It is not effective 
at temperatures below 60° F. After fumigation the seeds should be 
examined occasionally and given a second or third fumigation 
should living weevils be found. 
Carbon disulphid costs from 6 to 25 cents a pound. The following 
quotations were made during January, 1922, by a large producer of 
carbon disulphid: 
55-gallon drums of 550 pounds, at 64 cents per pound, drums $12 extra.” 
10-gallon drums of 100 pounds, at 73 cents per pound, drums $5 extra.” 
5-gallon drums of 50 pounds, at 73 cents per pound, drums $5 extra.” 
1 Cost of drum refunded if drum is returned f. o. b. factory in good condition within 
four months of shipment. 
