CATERPILLAR BORING IN MAIN STEM 183 
to a neighboring stalk. The entrance and 
Eo often the exit holes of the worms are evi- 
i dent, together with castings thrown out 
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a 
Fic. 115.—Stem cut open, showing larva of 
Stalk Borer at work. Original. 
of the burrow, and the plant often wilts 
beyond the point of attack. 
The full-grown larva measures about an 
Fic. 114.— Work of the 
Stalk Borer. Original. Fic. 116.— Adult of the Stalk Borer. Original. 
inch in length. It is marked with five longitudinal stripes, but those 
on its sides are broken and wanting from the third to the seventh 
segments. The adult is a gray moth. Eggs are laid in the fall on 
the ground near suitable food plants, and hatch the next spring. 
