ROUGH-HEADED CORN STALK-BEETLE. 5 



leaves retaining their freshness for a considerably longer period. The 

 roll of wilted leaves soon dies and can be pulled out with little effort. 



fiL;5^>....-C.-r 



Fig. 3. — Field of corn showins severe injury by the rougli-lieaded corn stalk-beetle. 



By the time the corn is 3 feet tall the tender growing part of the 

 plant has been pushed above the level of the ground and is reached 

 rarely by the beetles. 

 Consequently, the dam- 

 age to the plants at this 

 stage is not so severe as 

 in younger stages and the 

 plants recover more 

 readily from the injury. 



SEASONAL HISTORY 



The rough-headed corn 

 stalk-beetle, in common 

 with certain other insects, 

 has four stages in its life 

 cycle, namely, the egg. 

 the grub or larva, the 

 pupa or resting stasre. and 

 the adult or beetle stage, 



the last, as stated, being responsible for the injury to growing corn 

 plants. 



The essential facts in the life history are briefly as follows: The 

 eggs (fig. 5) are laid in the early summer, chiefly during the m(mth 



Fig. 4. — Young corn plant, showing characteristic 

 injury by tlic rough-headod corn stalk-beetle. 



