NATURE NOTES 
j8o 
September 5.— Chipstead and Banstead Downs. Tea at Banstead. Return 
from Cheani. Charing Cross 2.6, London Bridge 2.15, East Croydon 2.36, 
Purley 2.44. Conductor, Mr. Edward A. Martin, F.G.S. 
ANSWERS TO CORRESPONDENTS. 
Dr. T. Drapes . — Your onions are attacked by the Onion fly, Anthomyia 
cepanim. As the pupae remain in the ground, onions should not be grown two 
years running on the same area ; but the ground should be deeply trenched. 
Infected onions should be carefully dug up and destroyed. 
One of the best means of preventing the flies from laying their eggs on the 
plants (which is the great thing to be aimed at) is to earth up the bulbs as high 
or a little higher than the neck ; this has proved very successful in many instances. 
Strewing sand soaked in paraffin oil along the drills, or watering with the follow- 
ing mixture : I pint of common carbolic acid, mixed with 1 quart of soft soap, 
dissolved in 1 gallon of boiling water ; stir until thoroughly mixed, and before using 
add thirty parts of water to one part of the mixture. As soon as any bulbs are 
seen to be attacked remove them, taking them up with plenty of soil, so as to be 
sure to take all the grubs too. They should be put into something from which the 
grubs cannot fall out, and burnt. Ground which has borne an infested crop should 
be dug up at once, and the surface soil turned well down, so as to bury any 
chrysalides that may be in it so deep that the flies will be unable to reach the 
surface when they emerge from the chrysalides. I should have mentioned that 
spraying with weak paraffin emulsion is effective in keeping away the flies. More 
than one application is necessary, particularly in showery weather. 
S. U. Body. — The specimen of rose was certainly bad, and we cannot, as a 
rule, name florists’ flowers. It is an old-fashioned garden form of the Rosa 
gallica, or French Rose, type, very near to the striped Rosa mundi. If you can 
get a better specimen we will submit it to a specialist. 
Mrs. Needham — Sedum Forsterianum. 
LETTER RECEIVED. 
Mr. M. J. Teesdale. 
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