CARTER: ILLINOIS TREES: THEIR DISEASES 



35 



Wound Treatment 



Wounds resulting from mechanical injuries or canker dis- 

 eases can be treated as follows. Remove all of the diseased or 

 injured bark (Fig. 35). With a chisel, remove all discolored wood 

 and sufficient living bark from around each wound or diseased 

 area to give an oval or egg-shaped area of exposed wood (Fig. 

 38). The long axis of the oval should be lengthwise of the stem, 

 since bark grows laterally over wounds. To prevent drying and 

 injury of the living bark, paint the cut edges of the bark with 

 shellac or wound dressing immediately after shaping the wound. 

 As soon as the material applied to the edges of bark is dry, use 

 denatured alcohol to disinfect any exposed wood from which 



Vig. .34. — Topping or dehorning usually is more detrimental than bene- 

 ficial to trees. It creates large wounds that do not callus over. 



