10 
MICHIGAN CIRCULAR BULLETIN NO. 135 
Plate V. A. “A chestnut branch, showing a young blight canker at 
the base of a side branch in contrast with the rough split older canker 
on the main stem.” Courtesy Office Forest Pathology, U. S. D. A. 
B. “A chestnut blight canker with swollen edges and with the dead 
bark peeled from the wood in the center.” Courtesy Office Forest 
Pathology, U. S. D. A. 
