190 



INSECTS AFFECTING THE CABBAGE 



infested roots. In some localities the growers search 

 regularly about the bases of the stems for the 

 bunches of whitish eggs, and claim it to be the 

 best method of checking the injuries of the pest. 



INJURING THE LEAVES. 



The Imported Cabbage Worm. 



Pieris rapse. 

 This insect was imported into America from Europe 

 about 1857, since when it has become exceedingly 

 destructive over a large portion of the United States 

 and Canada. The adult is a common white butterfly, 

 the female of which has two black spots- upon each 

 of the front wings (Fig. 100, c), while the male (Fig. 



Fig. 100. 



Imported Cabbage Worm : n, larva ; 

 c, female butterfly. 



b, chrysalis ; 



101) has but one. The former deposit, singly or in 

 clusters of two or three each, small, fusiform, yellow- 

 ish eggs upon the cabbage leaves, which soon hatch 



