SEASON FOR PRUNING. 61 



coal-tar cannot be used on the Plum, or other trees of 

 its class. On the contrary, there is no substance which 

 can replace it in the treatment of large wounds on 

 these trees ; but it should be used cautiously, espe- 

 cially in the case of young trees, and should not be 

 allowed to needlessly run down the trunk ; and it is 

 well to remember that the more active a remedy, the 

 greater the care necessary in its application. 



