Corn Earworm as an Enemy of Vetch. 5 
at that time underground and are not seriously affected by such 
freezes as occur in that latitude. 
MOTH AND CATERPILLAR. 
The adult of the corn earworm, or cotton bollworm (fig. 2), is a 
moth or miller which varies in color from a dull olive green in the 
male to a reddish brown in the female. It is to be seen flying about 
just before dusk in corn, cotton, and vetch fields, and at midday it 
may be found resting in the throat of young corn. Few growers 
recognize in this moth the parent of the corn earworm. The full- 
grown caterpillars attract more notice because they make their pres- 
ence known by serious injury to crops. 
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Fig. 2. 
Adults of corn earworm: a, With wings spread; 6b, in resting position, wings folded. 
Twice natural size. (a, Original; 6b, from Quaintance.) 
CLOSELY RELATED SPECIES. 
This moth is a member of the family of night-flying insects com- 
monly known as “millers.” The group is a large one, including 
many of our most injurious caterpillar pests. Among them are the 
common cutworms of the garden and field, the true army worm, the 
fall army worm (or grass worm), and the true tobacco budworm, 
all of which show habits similar to those of the corn earworm. 
The caterpillar of the corn earworm has been confused with the 
army worm, especially the fall army worm, because of the fact that 
when on vetch it feeds gregariously, or in colonies, and when the 
crop is cut moves or marches in “armies” to other fields. 
SEASONAL HISTORY. 
From South Carolina southward in May and June the first gener- 
ation is destructive to vetch, alfalfa, young corn, and cotton. The 
second, which makes its appearance in the latter part of June and 
