Xiii.] "DAMPING OFF" OF SEEDLING-TREES. 275 



three days, and the whole sowing reduced to a putrid 

 mass ; in drier seasons and soils, the spread of the 

 infection may be slower, and only a patch here and 



FIG. 42. A young beech-seedling attacked by Phytophthora. oinnivora : the mori- 

 bund tissues in the brown and black patches on the young stem, cotyledons, and 

 leaves, are a prey to the fungus, the mycelium of which is spreading from the 

 different centres. The horizontal line denotes the surface of the soil. 



T 2 



