6 FARMERS’ BULLETIN 1641 
Ficurp 4.—Old blight canker spreading to a 
sprout, The canker developed there bad a 
regular margin 
The fungus started on the opposite face of 
the limb and the two edges of the lesion have just grown together 
A blight canker with an irregular margin. 
VIGURE 5, 
the cracks or crevices of the 
thick bark is another indication 
of the disease. These pustules 
develop much more abundantly 
on the surface of cankers on 
smooth young growth than on 
those on thick-barked stems. 
In many localities in the 
Southern States, especially at 
the lower elevations, many of 
the chestnut trees have died 
presumably from a root-rot dis- 
ease that is quite distinct from 
the chestnut blight. Trees 
