176 PESTS OF GARDEN AND FIELD CROPS 
bordered with black. In the southwest there are four generations 
annually. 
Where attack is severe, fields should be mowed. Alfalfa that is 
pastured is much less liable to injury. 
Fig. 203.— Adult of the Imported Cabbage Worm. Original. 
The Imported Cabbage Worm (Pontia rape Sch.) 
A velvety green worm, an inch to an inch and a half long, eats large, 
irregular holes in the leaves of cabbage or cauliflower, and disfigures 
the heads by deposits of excrement. When examined closely, the worm 
is seen to have a faint yellow 
stripe down the center of its 
back. 
The adult is the familiar 
white ‘cabbage butterfly,” 
often observed hovering over 
fields of cabbage or cauliflower 
all through summer. There 
are from one to four or five 
Fic. 204.—The Imported Cabbage Worm, broods, according to the section 
Larva on leaf. Original. where found. 
