THE CABBAGE 



125 



carried into practice at frequent intervals, thus keeping 

 the worms well in check. If the plants are treated with 

 insect-powder once a week during the time the worms 

 are present, they will cause little or no trouble. 



There are several other caterpillars affecting cab- 

 bage especially the CABBAGE PLUSIA and the ZEBRA 

 CATERPILLAR which sometimes necessitate a spray- 

 ing with kerosene emulsion or insect-powder. 



The CABBAGE APHIS is a small, greenish insect, 

 generally covered with a whitish, mealy coating, that 



Imported Cabbage=worm 



a, larva; 6, chrysalis; c, female butterfly. (After Riley) 



occurs in great numbers on the leaves and in the 

 heads of cabbage. During the summer months it re- 

 produces viviparously, but in autumn true males and 

 females are developed, eggs being deposited by the 

 latter upon the cabbage leaves. 



Remedy Kerosene in mechanical mixture or 

 emulsion and fish-oil soap are the most effective liquid 

 insecticides that can be used against this insect. 



Young cabbages are often attacked by flea-beetles, 

 especially the WAVY-STRIPED FLEA-BEETLE. It is a 

 small, shining black beetle, i-io inch long, with a 



