226 



DIPTEKA OK TRUE FLIES. 



ground. They must not be confused with the Celery -stem 

 Maggot, Piophila ajdi, although the T. onopordinis larva lias 

 been found in the celery stalks. 



Prevention and Remedies. — As wo find the puparia in the 

 leaves aiid in the ground, we must try to get rid of them 

 in both places, and so effectually stop their increase. The 



Tiu. 114.— Cf.i,krv FLY^Tephrilis onopordinU). 

 1, Imago; 2, lana, mag.; 3, rur», nat- size; 4, leaf mined lij-larTa:. (Whitehead.) 



leaves should be burnt and the beds dressed with gas-lime 

 in the winter, as after all attacks of garden pests. Spray- 

 ing the young celery plants with paraffin emulsion, every 

 now and then in the summer, keeps off the fly. The old 

 plan of pinching the leaves that are blighted cannot he 

 advised, as the leaves get ruptured and the sap pours out, 

 and thus more damage is done than by the larva. 



