TREE DISEASES 



159 



There is no remedy or preventive for this disease. From 

 the nature of its attack, which is on the inner layer of the 



FIG. 111. Chestnut Trees Killed by the Chestnut Disease. 



tree, it is evident that all applications of fungicides, which 

 must necessarily be applied to the outside of the tree, 

 will not reach the disease. Injections are impossible and 



