CELERY FLY 227 



ounces of soft soap, straining and diluting to two 

 gallons with hot water, using when cool. The foremen- 

 tioned washes should be sprayed or sprinkled on the 

 plants at intervals of a fortnight or three weeks. 



4. As many of the pupae remain in the earth 

 during the winter, it is important to level the ground 

 after the Celery crop has been cleared, both in the 

 case of infected Celery and Parsnips, and to collect 

 and burn all foliage and stems directly the crops have 

 been dug, then apply a dressing of gas lime, fresh 

 from gasworks, at the rate of seventy pounds per rod, 

 or five tons per acre, spreading evenly and leaving on 

 the surface a month or six weeks before digging or 

 ploughing in deeply. Where gas lime cannot be 

 readily got a dressing of stone lime may be used in 

 double the amount to that of gas lime. In gardens 

 burying the upper surface deeply, as in trenching, is 

 a good practice, as it prevents the flies from coming up. 

 By pursuing this procedure there is little danger of 

 attack from Celery Fly from a previously infected crop. 



5. The trimmings of infected Celery or Parsnip 

 crops should not be placed on rubbish heaps, as the 

 pupae in infected leaves and stems are likely to be 

 carried out with compost or manure, and the flies 

 coming out attack Celery or Parsnip crops growing 

 near. If not collected and burned, or put on manure 

 heaps in a high state of fermentation, the debris of 

 infected crops is almost certain to be a source of 

 renewed attack. 



6. In order to induce free growth in attacked 



