INSECTS INJURIOUS TO CORN 



171 



ing into silk and tassel, upon which the moths always prefer to 

 lay their eggs. As a result, the caterpillars of the second genera- 

 tion of the South, and the third farther North, do serious injury 

 to field-corn, gnawing out the kernels at the tips of the ears, and 

 furnishing favorable conditions for molds to propagate, which 



FIG. 147. Corn ear-worm. Husk of ear of sugar-corn torn open, showing 

 worms at work on tip and hole through which a full grown worm has left. 



do further injury. From 2 to 5 per cent of the corn crop of the 

 country, with a cash value of $60,000,000 to $150,000,000, is thus 

 destroyed by the ear-worm annually. 



The third generation of moths appears the last of August 

 in Delaware and Kansas and gives rise to the third brood of 



