226 



MANUAL OF TREE DISEASES 



green after the remainder of the leaf has faded or turned 

 bright colored. The fungus causing this leaf-spot is a near rela- 

 tive of the tar leaf-spot fungus (see page 223). Spores are de- 

 veloped in the same manner and control measures are the same 

 for both diseases. 



Leaf-Spots 



Caused by PhyUosHcla minima (B. and C.) E. and B., Glaeosporium 

 apocryptum E. and E., and other fungi 



The leaves of maple are subject to a number of leaf-spot 

 diseases (see page 30). The two fungi named above are com- 

 mon in eastern United States and may be found every year. 





Fig. 37. — Leaf-epot of maple caused by Phyllo»ticta minima. 



