OF INJURIOUS INSECTS. 
IS 
well-made manure, principally Cow manure. We work the ground 
deeply, and trench if need he. After lying exposed to the frost for 
some time, the ground is pulverised (with a steel fork), on the surface, 
without turning up the manure, then trodden down well previous to 
sowing, which we do as early as possible in March, providing the 
ground is in good condition. We sow in lines a foot apart. After 
covering in the seed we pass a heavy iron roller a few times over the 
ground to firm it well. We sow thinly, so that we seldom require to 
thin the plants. In this way we never fail to have excellent crops of 
Onions, although the garden has been very subject to attacks from 
Onion Fly ; and there are many gardens in the neighbourhood where 
the Fly has all its own way with the Onion crops.” At Maxwelltown 
Dumfries, Mr. R. Service mentions the Onion Fly being as destructive 
as usual; and observes that it is worse on the little plots of the 
cottagers than in large gardens or nurseries, this (conjecturally) owing 
to the difference of cultivation. Possibly, also, though this may be 
included under the head of cultivation, the amount or nature of 
manure applied in cottage gardening may be insufficient or unsuitable. 
At Bury, Lancashire; Addington, Bucks; Isleworth, and Maldon, the 
Onion Fly was not noticed. At Tangley, Guildford, the Onions were 
remarkably good on the same plot of ground used last year; a liberal 
supply of wood ashes and ashes of garden refuse was given as manure. 
Tephritis Onopordinis. 
8. Tephritis Onopordinis. Celery Fly. This is mentioned as 
very prevalent at Addington, Bucks; Ashford, Kent; and Maldon; 
