248 



Minnesota Plant Diseases. 





Fig. 121.— The dry-rot fungus (Merulius lacrymans). 



board which has been attacked by the dry-rot mycelium; it is not yet, however com- 

 pletely converted to punk. The felted mycelium has been partially removed, 'show- 

 ing the accentuated gram of the attacked portions. The mycelium has penetratedl 

 some distance beyond the white mycelial felt. Original. 



Shows the surface of a pine 

 ium: it is not yet, however, com- 



