Blight Canker of the Apple Tree. 



199 



Fig. 74. — Typical body canker in its first stage. Re- 

 sulting from infection through blighted watersprouts. 



Fig. 75. — Pruned stub canker. In- 

 fected at time of pruning, probably 

 by the saw. Note the collar of dead 

 bark. 



Fig. 76. — Pruned stub canker. 

 The bacteria did not die the first 

 season, but continued through- 

 out the ivinter slowly to work 

 down the side of the limb. The 

 diseased bark has all been cut 

 away preparatory to treating 

 and painting the wound. 



