Fig'. V. Fire blight canker and treatment. 
1. Canker. — Apparently gained entrance through a spur. 
2. The wrong way to cut out the canker. 
3. The right way. The cut should be made with a sharp tool, perpen- 
dicmlar to the surface of the bark, and pointed at the top and bottom. 
4. Treated Wound. — All diseased portions should be removed and disin- 
fected before protecting with gas tar. 
