326 Gardening 
This insect is injurious through its whole life, except 
when dormant in winter. It is found throughout the 
4 U.S. D. A. 
Fic. 180. Life history of the harlequin, or calico-back cabbage bug: a, adult; 
b, egg mass; ¢, first stage of nymph; d, second stage; e, third stage; f, fourth 
Stage; g, fifth stage. All enlarged. 
entire United States and is reported to be most abundant 
east of the Rocky Mountains. 
Unfortunately the common squash bug resists kerosene 
and nicotine sulfate sprays, but the following methods of 
control are effective when carefully carried out: 
(1) Hand-picking. The adult bugs are picked from 
the vines throughout the season, or if pieces of board are 
placed in the garden, especially during spring and early 
summer, the insects gather beneath them. Collect and 
crush the eggs also. 
