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 

 the barn or crib while the 

 odor of carbon disulfide is 

 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. 



FIG. 106. LARVA OF ANGOUMOIS 



MOTH IN A GRAIN OF CORN. 

 Enlarged five times. (W. E. Hinds.) 



