The European Corn Borer. 13 
Outside of this area which has just been discussed, and even in 
some fields within it, little or no economic damage has occurred to 
either sweet or field corn, owing to the light character of the infesta- 
Fic. 9.—Typical injury by the Duropean corn borer to the grain on the immature ears 
of flint (field) corn. Borers are shown feeding in natural position. The interior of the 
cobs was also badly tunneled by the borers. 
tion and possibly to the clean-up methods which have been employed 
by the State and Federal authorities, as well as by farmers, gar- 
_deners, and other interested persons. 
