Bui 44-, Buieau of Plant Industry, U. S. Dept, of Agriculture. 



Plate VI 



Fig. 1. — Plate Culture. 



Fiq. 2. — Pustules on Apple. 



Fig. 3. — Apple Inoculated from a Pure Cul- 

 ture Obtained from a Canker. 



Fig. 4. — Control Fruit 



Stages of Growth of the Bitter-rot Fungus. 



