326 



Gardening 



This insect is injurious through its whole life, except 

 when dormant in winter. It is found throughout the 



u. s. D. A. 



FIG. 180. Life history of the harlequin, or calico-back cabbage bug: a, adult; 

 b, egg mass ; c, first stage of nymph ; d, second stage ; e, third stage ; /, 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 : 



(i) 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. 



