274 FUMIGATION METHODS 
which would never be equaled in ordinary practice, a 
majority of the varieties tested showed no injury and 
germination was practically the same in each lot. 
Seeds of the grass family appeared more tender than 
other kinds. Experiments were also conducted upon 
grain in bulk, using the liquid at the rate of one pound 
to 100 bushels of grain. ‘The exposure lasted twenty- 
four hours. No injury could be detected in even the 
most delicate seeds. 
Treating seed and grain in bulk.—Such seeds as 
corn, wheat, rice, peas, beans, cow-peas, and others 
are frequently attacked by insects and seriously injured 
or entirely destroyed. No insecticide now known is 
equal to carbon bisulphid for the destruction of such 
pests. Seeds or grains to,be fumigated should be placed 
in barrels, bins, or rooms. ‘The enclosure should be 
tight. Apply the carbon bisulphid as directed above, 
at the rate of from one to one and a half pounds for 
each 1,000 cubic feet of space. A bin or room ten feet 
each way, or 1,000 cubic feet, will hold about 100 
bushels of grain. A barrel or small enclosure will 
require a larger proportional amount unless it is very 
tight. Place the liquid on top of the seed in shallow 
vessels. A small bin or barrel should be covered with 
heavy blankets to better retain the vapor. Close 
the receptacle for 24 or 36 hours. ‘The germinating 
power of the seed will not be injured in the least, other 
conditions being normal. Rye, millet, barley, and 
crimson clover are the most liable to injury and should 
receive proportionately a less amount. 
As many of these pests enter the seeds in the open 
field while the grain is in shock, stack, or growing, itis 
