300 
Garden Work 
dull, damp weather, when there is no chance of the flies 
being on the wing, for these flies seem to be attracted by 
the smell of Carrots when they are disturbed. For this 
reason, weeding, &c., should be done, if possible, in dull 
weather, especially in infested districts. After thinning has 
been done, the soil should be drawn up round the base of 
the leaves, and the bed should 
be sprinkled with paraffin and 
water, or soot, as advised for 
the Onion. This should be 
repeated at intervals during the 
season. After an attack the 
ground should be treated with 
gas lime, and, if possible, Carrots 
should not be grown on the 
same ground for a year or two. 
Celery Fly. — In some dis- 
tricts, and in some seasons, this 
fly is a very troublesome pest 
to the Celery crop. It is pale 
brown in colour and hovers 
about the Celery, generally dur- 
ing the month of June. After 
the eggs are laid, the maggots appear in a very short time. 
These eat their way through the tissue of the leaves, form- 
ing the large familiar blisters. When the larva has grown 
to its full size it either changes into a pupa in the leaf 
itself or it may drop off and pupate in the soil. From 
the pupa emerges the mature fly. Three or four broods 
may be matured in one season. From the rapidity with 
which they increase it will be evident that energetic 
i, Fly (magnified). 2, Lines show- 
ing nat. size. 3, Larva and pupa figured 
on blistered leaf. 
