32 



FARMERS BULLETIN 856, 



Control. — Arsenate of lead is the best remedy, and wliile it leaves 

 a coating on the outer leaves until late in the season, it remains to be 



seen whether this affects 

 even domestic animals. 

 These leaves always are 

 removed before cooking, 

 and whatever trace of 

 arsenate might remain 

 would not be injurious to 

 the consumer. See Farm- 

 ers' Bulletin 766. 



OTHER CABBAGE WORMS. 



Other species of butter- 

 flies as well as moths pro- 

 duce what are commonl}^ 

 called caterpillars, and 

 these can not be readily 

 identified by the average 

 grower until full grown, 

 since in their early 

 stages they resemble one 

 another. Of these there 

 is the southern . cabbage 

 butterfly,^ which resem- 

 however. 



Fig. 34. — The common cabbage worm (Poniia rapae) : 

 a, Feroale butterfly; h, egs (above as seen from 

 above, below as seen from side) ; c, larva, or worm, 

 in natural position on cabbage leaf ; </, suspended 

 chrysalis. a, c, d, Slightly enlarged ; b, more 

 enlarged. 



mm^m 



^;^: ■^•^*--/ 







Fig. 35. — Cabbage seedlings grown in coldfranies, showing injury by the common cab- 

 bage worm. This necessitates replanting and additional labor, and causes delay in 

 getting cabbages to the early market. 



Pontia protodicc Boisd. 



