4M? FRUIT TREES. Ill 



between the 10th and 20th of June, and continues 

 about liiteen days; and then gradually wears off, 

 until the old carcass appears, which by this time is 

 formed into a new blister, and contains the spawns or 

 nits before mentioned. 



"These blisters prevent the circulation of sap, and 

 prove as fatal to the tree as the canker worm. 



"In order to remedy the difficulty, 1 have made 

 many experiments within a few years ; but long to no 

 good effect, not knowing then the particular season 

 when these animalcules could be most easily destroy- 

 ed. This, however, I have lately found to be be- 

 tween the time they hatch, and that when the mould 

 leaves them.* The application that I have found 

 most effectual is, washing the trees with lie or brine. 

 Lime, also, mixed with lie, to the consistence of 

 white wash, may be useful. And although the small 

 branches cannot be cleansed in this manner without 

 much difficulty, still, if the body of the tree, and the 

 branches near the body are kept clean until there 

 comes a rough bark, I think the lice will not kill the 

 tree. 



" Some people have recommended the application 

 of train oil to the tree, which, indeed, is a powerful 

 antidote against lice, but being of a glutinous quality, 

 is very detrimental to the tree. Inoculation has been 

 proposed ; which, I think, will have no effect at all 

 on the lice; for T perceive they hatch in May, on 

 branches that were pruned off the tree in March, and 

 the sap entirely extinguished. 



" These lice are natural in the uncultivated forest 

 on what is called moose-wood, and other bushes. 



u Much care should be taken on their first appear- 



*" It appears from this account, by Mr. Perley, that these 

 appearances can, in general, only occur between May 25, and 

 July 5." 



