Fic. 4.—Cabkage showing severe injury by the common cabbage worm. 
4 FARMERS’ BULLETIN 166. 
Frequently the caterpillar bores into the center of the cabbage, 
attacking what is commonly known as the “heart,” and then the 
entire head is worthless for market. Figure 4 illustrates this form 
of injury. Seedling cabbage grown in cold frames is also often 
damaged. Injury of this nature may be very serious, many of the 
plants being a complete loss, while the remainder make poor growth. 
Figure 5 illustrates an unusual form of damage in which the insects 
occur in such numbers as to congregate on a single leaf and ruin it 
never make a marketable head. (Original.) 
in a very short time. This illustrates complete defoliation, and also 
is an indication of the sluggish habits of the larve during resting 
periods. 
As early as 1869, when this cabbage. worm was confined to limited 
areas in Canada, New England, and New York, it did great damage. 
At St. Albans Bay, Vt., in that year it caused the total destruction 
of a crop of 3,000 cabbage plants. The worms made their appearance 
This cabbage plant will 
