14 



Canker" Fungus. 



protected with a coat of gas-tar. If the disease has spread 

 from the original point of infection, and appeared at the 

 surface in other places, the branch should be cut off. 



Lt is very important that grafts should not be taken from 

 diseased trees, as parts that appear to be sound may contain 

 the fungus in their tissues. 



The white stage of the fungus can be killed by applying 

 with a brush a solution of sulphate of iron — i lb. to a gallon 

 of water. , This mixture will also destroy lichens and moss 

 growing on the trunk and branches. 



Description of the Figures. 



1. A young branch of apple-tree badly attacked by the 



canker fungus. 



2. A stout branch of an apple-tree attacked by the canker 



fungus. The fungus gained an entrance through the 

 crack at a> and caused the curved cracks in the bark. 

 At b and c lichens are growing on the bark. 



3. A crack in the bark caused by the canker fungus. The 



groups of fungus fruit are seen springing from the 

 sides of the wounds.* 



* Copies of this article may be obtained free of charge and post free on application 

 to the Secretary, Board of Agriculture, 4, Whitehall Place, London, S.W. Letters 

 of application so addressed need not be stamped. 



