CORN INSECTS 



213 



ments. A larger amount of carbon disulfide is needed 

 for the treatment of unshucked corn than in treating an 

 equal volume of shucked or shelled corn. The amount of 

 liquid to use for each thousand cubic feet of space in a bin 

 of shelled corn is from 10 to 20 pounds if the crib is very 

 tight and the weather warm. 

 Since these fumes are heavier 

 than air, the liquid may be 

 placed in shallow vessels near 

 the top of the pile of grain ; 

 or it may be poured directly 

 on the top of the pile of corn. 

 It is best to cover the pile 

 while under treatment with 

 grain sheets or other heavy 

 cloth, leaving it thus tightly 

 covered for twenty-four hours. 

 The vapors of carbon di- 

 sulfide are very inflamma- 

 ble, so that it is dangerous 

 for a lighted pipe, cigarette, 

 or lantern to be brought into fig. io6. — Larva of Angoumois 

 the barn or crib while the '^o™ ™ a Grain of Corn. 



odor of carbon disulfide is Enlarged five times. (W.E.Hinds.) 



present. This liquid should be handled as carefully as 

 gasolene. The fumes should not be inhaled for many 

 minutes, but a few breaths of this gas do not injure 

 men or domestic animals. 



The larvae of several tiny grain-moths, among them the 

 Indian meal moth (Fig. 107), injure stored corn. The rem- 

 edy^ for all of these consists in the use of carbon disulfide. 



