24 
NOTES OF OBSERVATIONS 
ground which did not receive the same treatment as the rest with 
regard to manuring, and where consequently the plant was more 
feeble than on either side. He considers that had manure and the 
want of having applied salt were the cause of the attack, and recom¬ 
mends that good manure, rich and well rotted, he ploughed in at the 
autumn ploughing, and artificial manure with salt be applied in the 
drill at sowing time. With regard to prevention Mr. Sym Scott notes, 
“ I kept some women pulling out every plant as it showed symptom of 
the Worm and had them removed from the field, which I believe was 
a great means of saving part of the crop.” This Grub is noted on the 
15th of July as taking Carrots in small patches at Tangley, Guildford; 
soot and paraffin were applied, and the Carrots afterwards showed 
very good roots at the spots where this dressing was given, which had 
been the worst points of the attack. 
In my garden at Dunster Lodge, near Isleworth, where the Carrots 
are subject to attack from this Fly, I had a small plot prepared in the 
spring by digging the soil entirely out to the depth of eighteen inches. 
This space was filled in again with a mixture of about one-tliird leaf- 
mould of decayed Elm leaves, one-tliird of the loam that had been dug 
out, and another third composed of coal-aslies, broken peat, and a 
little white sand, well mixed together. The Carrots were sown on the 
12th of March, and did very well till the end of June, when they were 
thinned, and very shortly the Grub appeared amongst those most 
disturbed by thinning. I watered them well with dilute soluble 
plienyle, and further on repeated the application in still more dilute 
form, pouring it over the leaves, and then giving a good washing with 
pure water. The Fly attack was stopped, and the Carrots grew 
vigorously. 
Aphis humicis. 
1, Bean-shoot, with Aphides; 2, male; 4, female (bothmagnified). 
10. Aphis rumicis, Bean Aphis; Collier. This was very bad in 
some parts near Dalkeith during the hot weather of July and August. 
