18 
CARROT. 
“ The last serious attack I had of this pest was in the wet summer 
of 1879, when the crop was scarcely half an average. How to combat 
it I have no idea, unless by repeated applications of soot or soot and 
gas-lime, but, from its speed in reproducing itself, it is with difficulty 
kept in check in fields of many acres in extent.” * 
Carrot Fly. Psila Rosce, Fab. 
Carrot Fly. 1, 2, 3, larva ; 5, 6, pupa ; 7, 8, Fly ; all nat. size and mag. 
The following information regarding prevention of worm in Carrots 
on the scale of farm treatment is contributed by Mr. J. Speir, Newton 
Farm, Glasgow :— 
“ This season my Carrots, of which I generally grow from fifteen 
to twenty acres, have been more damaged by the worm than usual. 
Part of them are after Potatoes and part after Oats, and (like the 
Parsnips) the greatest amount of damage is done after green crop. In 
the south-west of Scotland it is generally found that Carrots worm 
more after a green crop than after a grain crop. 
“ The reason I presume to be that in the former case (that of 
following green crops) the land is not so mellow and open, more 
approaching land which has been carted over in wet weather, which 
in nearly every case is sure to worm. 
“ The remainder of my Carrots, in another field about a mile off, 
low-lying and slightly sheltered after Oats , have hardly any Carrot worm. 
“ I find soot is nearly a preventive when duly applied, but that it 
does no good when the pest has made its appearance. 
* Carrots are attacked by several kinds of Aphides. Amongst these the 
A. papaveris attacks the leaves. This, according to its condition, is almost black, 
black with greenish abdomen, or pale green. It frequents Chervil and similar weeds. 
The A. carotce is green, and is found on flowers-stems of Carrot, also below ground. 
It is hardly possible to suggest a remedy, except drenching with soft-soap, which 
is difficult in field growth; but turning the surface and dressing with fresh gas-lime 
in the autumn would be of use in cleaning the ground. 
