174 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



in seven to ten days. The second brood of larvae feed on the old 



FIG. 127. a, b, c, varieties of the larva of the larger corn stalk-borer; d, 

 third thoracic segment; e, eighth abdominal segment; /, abdominal 

 segment from side; g, same from above enlarged. (After Howard, 

 U. S. Dept. Agr.) 



stalks, tunneling them between the second joint and the ground, 



and become full grown about 

 harvest time when they go 

 into winter quarters in the 

 root as above described. 



Control. It has been 

 observed that late planted 

 corn is much less injured 

 than that planted early, 

 but as it is more seriously 

 injured by some other pests, 

 late planting may not be 

 advisable. 



Where corn has been 



FIG. 128. The larger corn stalk-borer, 

 a, female; b, wings of male; c, pupa 

 all somewhat enlarged. (After 

 Howard, U. S. Dept. Agr.) 



seriously injured, the- old 

 stalks or butts should be 

 dragged off the field and 

 burned late in the fall, thus destroying the over-wintering borers. 



