CHERRY LEAF SCORCH 



duced in perithecia seated on discoloured spots on the 

 leaves. During the winter, the ascigerous form of fruit is 

 also produced on the dead, hanging leaves. 



Preventive Means. — All the dead, infected, hanging 



Fig. 19. — Gnomonia erytkrostoma. 1, a diseased, dry, 

 shrivelled leaf that has been flattened out to show the 

 fungus ; 2, ascus and spores, x 300 ; 3, section through 

 a perithecium and portion of the leaf in whieh it is 

 imbedded, slightly X . 



leaves must be collected and burned. This must, to 

 succeed, be general throughout the infected district. 



Frank tells of one district in Prussia where this method 

 was carried on for two seasons, after which the cherry 

 crop, which had been completely ruined, was restored to 

 its former productiveness. 



