DISEASES OF CULTIVATED PLANTS _ 41 
TIMBER ROTS 
Wound or Timber Rots of oaks are as yet imperfectly studied and call or 
thorough investigation before many statements can be made for us. 
Fig. 61. A wound parasite (Pleurotus ulmartzs) on the trunk ofa 
maple tree. (After Fr Min ta Plant Di ) 
OATS 
Anthracnose (Colletotrichum cereale Manns.) is a new disease of oats which 
attacks the roots and basal portions of the culms together with the lower 
sheaths. The attack may extend even further than has yet been determined. 
The spores of this fungus were found adhering to seed oats of the crop of 1907 
and the outbreak of the disease was studied in 1908. It shows by the develop- 
ment of the characteristic dark masses or acervule of the anthracnose fungus 
upon the lower joints of the stem, portions of the root and leaf sheaths. 
