i 
4 FARMERS’ BULLETIN 634. 
Seldom is the stalk damaged above the third jomt from the ground, 
although the larvee, when small, are found in the large midribs of 
the lower leaves and later in the season, when the food supply is 
restricted, even in succulent nubbins farther up. They sometimes 
also penetrate the underground part of the stalk in feeding and enter 
some of the larger brace roots for a short distance. 
Fic. 3.—The larger corn statk-borer: Larva in lower part of corn plant preparatory to hibernation. Re- 
duced. (Author’s illustration. ) 
The larvee of the second generation work in a similar manner, except 
that at the time they appear the tassel has been formed; hence the 
damage is now confined altogether to the lower stalk. Thus, instead 
of arranging to pass the pupal stage in the upper stalk, they pene- 
trate to the root to hibernate and there, as larve, pass the winter 
in a quiescent state (fig. 3). 
