' TURNIPS. 99 
4 • 
He advises to sow half a gallon of seed per acre, in¬ 
stead of the usual quantity of from 1 to 2lb. ; when 
the plants appear to harrow the piece with light 
harrows lengthwise, and a few days after harrow 
crosswise, the fly, he says, will be much disturbed by 
the harrow, the plants thinned, and the operation of 
hoeing facilitated. Respecting the best method of 
using turnips to advantage, he thinks, if the land be 
in high condition, a considerable part of the crop may 
be drawn off to stalls, or turf land, for cattle, or sheep; 
but if the land be indifferent or poor, the greatest part 
should be consumed by sheep, on the place of growth. 
Turnips are often sown on early stubbles near Kid¬ 
derminster and elsewhere, on sandy land, for spring 
sheep pasture; and, to be succeeded by turnip fallow. 
A very good crop, 1807, there, sown after barley, 
harvested August 3. 
Mr. Carpenter has since communicated to me his 
preventative, or preservative, against the fly in tur¬ 
nips, which he permits me to make public, together 
with a certificate from a gentleman who has proved it. 
He intends to publish a second edition of his Treatise 
on Agriculture; but, supposing this Survey may come 
before the public sooner than that makes its ap¬ 
pearance, he permits me first to report it. If the effect 
should be properly established by experiment, he will 
certainly be entitled to the consideration of his coun¬ 
try, and to a remuneration proportioned to the im¬ 
portance of the discovery. He believes it will never 
fail, if strictly adhered to. 
The turnip fly, that he refers to, appears to me, 
from his description, to be of the beetle kind, (chry- 
somela nemorum,J wings two, covered by two shells, 
skippers, hop or take wing, length half a line (Ber- 
kenhout). 
