244 
HEMIPTERA. 
there in such incredible luxuriance, that many trees seemed, 
at a short distance, as if they had been whitewashed. 
Mr. Knapp thinks that remedies can prove efficacious in 
removing this evil only upon a small scale, and that when 
the injury has existed for some time, and extended its influ¬ 
ence over the parts of a large tree, it will take its course, 
and the tree will die. He savs that he has removed this 
blight from young trees, and from recently attacked places 
in those more advanced, by painting over every node or 
infected part of the tree with a composition consisting of 
three ounces of melted resin mixed with the same quantity 
of fish-oil, which is to he put on while warm, with a painter’s 
brush. Sir Joseph Banks succeeded in extirpating the in¬ 
sects from his own trees by removing all the old and rugged 
bark, and scrubbing the trunk and branches with a hard 
brush. The application of the spirits of tar, of spirits of 
turpentine, of oil, urine, and of soft soap, has been recom¬ 
mended. Mr. Buel found that oil sufficed to drive the 
insects from the trunks and branches, but that it could not 
be applied to the roots, where numbers of the insects har¬ 
bored. 
The following treatment I am inclined to think will prove 
as successful as any which has heretofore been recommended. 
Scrape off all the rough bark of the infected trees, and 
make them perfectly clean and smooth early in the spring; 
then rub the trunk and limbs with a stiff brush wet with a 
solution of potash as hereafter recommended for the destruc¬ 
tion of bark-lice; after which remove the sods and earth 
around the bottom of the trunk, and with the scraper, brush, 
and alkaline liquor, cleanse that part as far as the roots can 
conveniently be uncovered. The earth and sods should 
immediately be carried away, fresh loam should be placed 
around the roots, and all cracks and wounds should be filled 
with grafting cement or clay mortar. Small limbs and 
extremities of branches, if infected, and beyond reach of 
the applications, should be cut off and burned. 
