PLATE CVIII 



Fig. i. — A potato tuber infected with powdery dryrot, showing the wrinkled con- 

 dition of skin due to the decay of underlying tissues. 



Fig. 2. — A potato tuber infected with powdery dryrot: Advanced stage. Note 

 the presence of Fusarium trichothecioides on the surface of the decayed portion of the 

 tuber. 



Fig. 3. — Section through a potato tuber infected with powdery dryrot, showing the 

 internal cavities filled with the mycelium and the spores of the fungus. 



(832) 



