124 



Effective Farming 



to be fumigated. It may be placed in shallow vessels on top 

 of the corn or be poured on the pile, which should be covered 



with a heavy cloth and left 

 undisturbed for twenty-four 

 hours. Carbon disulfide is 

 very inflammable and all fire 

 should be kept away during 

 the fumigation. 



Migratory insects in corn. 

 -Migratory insects that 

 sometimes damage corn are 

 chinch-bugs and army- 

 worms. They can often be 

 prevented from entering a 

 corn field by throwing two 

 furrows together about the 

 field and maintaining in the 

 ridge formed at the top of 

 the furrow-slices a dust 

 barrier by means of drag- 

 ging a log along the ridge. 

 Holes dug at intervals in 

 front of the furrows on the 

 side from which the insects 

 are approaching will catch 

 many of them as they try 

 to get over the barrier, and 

 water with a little kerosene 

 placed in the holes will kill 

 the insects. 



Corn-smut. The most 

 troublesome fungous disease 

 of corn is smut. It appears in black masses of spores on any part 

 of the plant except the roots, but is usually found on the ears or 

 tassels. Fig. 44 shows a smut-infested ear. Warm moist 



FIG. 44. Corn-smut. 



