390 SOUTHERN FIELD CROPS 



of which usually 

 feed upon corn. 

 The first and second 

 generations feed on 

 the young leaves in 

 the bud or growing 

 part of the corn 

 plant ; the third 

 generation preys 

 chiefly upon the 

 ears of corn in the 

 green or roasting- 

 ear condition, when 

 the insect is known 

 as the corn ear- 

 worm or roasting 

 ear-worm. This in- 

 sect prefers corn to 

 cotton. Hence it 

 remains on corn as 

 long as the ears are 

 green. After the 

 greater part of the 



FIG. 168.-THE COTTON BOLL-WORM ON THE COm hardens, USU- 



OUTSIDE OF A COTTON BOLL. ally in July, and 



The mass of insect castings near the top of after the third and 



the picture suggests the injury already done to more numerous 



the interior of the boll. 



generation of worms 



appears, severe injury is done to the squares and bolls 

 of cotton. 



360. Preventive measures. In spite of the great 



