590 



Bulletin 283. 



; 



; 



CABBAGE AND CAULIFLOWER. 



The green caterpillars (Fig. 197) hatch from eggs laid by the 

 Cabbage-worm, common white butterfly. There are several broods every season. 



If plants are not heading, spray 

 with kerosene emulsion or with Paris green to ,.,;_rfA 



which the sticker has been added. If heading, ,/r-T— ,., 



apply hellebore. 



These small mealy plant-lice are especially 

 troublesome during cool, dry seasons when their 



natural enemies are less active. 

 Cabbage aphis. Before the plants begin to head, 



spray with kerosene emulsion 

 diluted with 6 parts of water, or whale-oil soap, 

 I lb. in 6 gals, of water, or use one of the tobacco 

 extracts. 



The white maggots that feed on the roots (Fig. 

 198) hatch from eggs laid by a small fly somewhat 



resembling the common house 



Cabbage fly near the plant at the sur- 



root-maggot. face of the ground. Hollow 



out the earth slightly around 

 every plant and freely apply carbolic acid emul- Fig. 197. 

 sion diluted with 30 parts of water. Begin the 

 treatment early, a day or two after the plants are 



up or the next day after they are set out. Repeat the application every 7 to 10 

 days until the latter part of May. It has also been found practicable to protect the 

 plants by the use of tightly fitting cards cut from tarred paper. Cornell Bulletin 78. 



Imported cabbage- 

 worms. 



Fig. 198. Cabbage root-maggots. 



To protect the plants in the seed-bed, surround the bed with foot -boards placed 

 on edge and cover tightly with a screen of cheese cloth as soon as the plants begin 

 to appear. Remove the cloth 10 days before ready to transplant to harden the 

 plants. Geneva Bulletin 302. 



