PLATE VII 



Fig. I. — Givens apple having numerous small blister-like infections of bitter-rot. 



Fig. 2. — Bitter-rot canker from a Jonathan apple tree. 



Fig. 3. — Part of a branch of a Givens apple tree which had been injured probably by- 

 freezing. Acer\'~uli of the bitter-rot fungus were obtained from the dead part of this 

 branch . 



Fig. 4. — Apple branch showing blighted area on which acervuli of the bitter-rot 

 fungus were found. 



Fig. 5. — Mechanically injured branch of a Missouri Pippin apple tree. Acervuli of 

 the bitter-rot fungus were found about the margins of the injured part. 



Fig. 6. — Branch of Missouri Pippin apple tree affected with apple-blotch. The 

 bitter-rot fungus was found to be wintering over in blotch cankers. 



