256 



THE MONTHLY BULLETIN. 



THE CABBAGE OR RADISH MAGGOT. 



Phorhia hrassicw Bouclie (Family An thorny idifi). 

 (Pigs. 253-255.) 



General Appearance. — The adult flies are greenish-brown in color 

 and slightly larger than the common house flies. The maggots are white 

 or cream colored and only about one half inch long. They are found 



Fig. 253. — The cabbage maggot (Phorbia hrassicw 

 Bouche). Larvae and puparia at left and adult at 

 right. ( Original. ) 



in cabbage stems or in radishes, turnips, etc. The pupge are smooth, 

 elongate-oval and rich reddish brown in color. They are located in 

 the old burrows or more' often in the soil. 



Life History. — The eggs of this fly are laid near the root in the soil 

 in the spring after the plants have come up in the fields or after they 



Fig. 254. — Wing of the cabbage maggot, Phorhia hrassicw Bouche. (Original.) 



have been transplanted. The small maggots begin to bore into the root 

 of the plant as soon as hatched and remain inside throughout the larval 



