109 
On the Ravages of the Turnip Fly. 
1834. Experiment 1. 
July 12th. Some light sandy loam, richly manured, was exposed 
to a light temperature, and, when cold, placed in 
flower pots, previously boiled in water. Seeds of 
the following varieties of turnip : 
No. 1. Red Pudding, 
2. White Tankard, 
3. Yellow Scotch, 
4. Short-topped Swede, 
5. Green Round, 
6. Early Round, 
7. Early Stone, 
were then selected, and sown in separate pots, the 
pots covered with gauze, and placed in a green- 
house. 
Experiment 2. 
Seeds of No. 2 were sown in the same kind of soil, 
as in Exp. 1, but not baked, and the pots were 
plunged, unprotected, in the open ground. 
Experiment 3. 
Seeds of Nos. 1 and 6 were sown in the same kind of 
soil, baked, and plunged, uncovered, in the open 
ground. 
Experiment 4. 
Seeds of Nos. 3 and 4 were sown in unbaked soil, and 
the pots placed in the greenhouse : seeds of No. 7 in 
baked, and No. 5 in mixed, earth, were also placed 
in the greenhouse : all the pots unprotected, and not 
prepared by boiling in the three last experiments. 
15th. Seeds coming up in most of the pots. 
Experiment 5. 
All the varieties of seed sown in rows, eighteen inches 
long, in unmanured soil, in the open air. 
20th. Specimens of Haltica nemorum found upon Nos. 2, 1, 
and 6, in Expts. 2 and 3. 
22d. One beetle (//. olcracea ) found upon a plant of No. G, 
(Exp. 1), pot protected. 
Seeds of Exp. 5 coming up. 
24th. Green beetles (//. olcracea ), and striped beetles (//. 
