250 



MANUAL OF FRUIT DISEASES 



raised at the border. The spot 

 enlarges, becoming elongate in the 

 direction of the main axis of the 

 shoot. In later stages the center 

 becomes more depressed, and the 

 color turns grayish. 



The bark is finally destroyed, and 

 in severe cases the underlying wood 

 appears burned. Canes are not 

 often girdled, although affected 

 stems bearing clusters suffer in 

 this manner. 



On the berries the well-known 

 bird's-eye-spots are produced (Fig. 

 65). The lesions first appear as 

 small, dark-brown areas; later the 

 color is grayish in the center wher- 

 ever the cuticle is ruptured, but 

 the border remains dark. The 

 spots increase in size, but instead 

 of elongating as they do on the 



canes, they remain somewhat circular. Between the gray 

 center and the dark border is a well-defined band of bright red. 

 The appearance thus resulting has given rise to the name bird's- 

 eye-rot. Finally the berries wither and dry up, leaving a 

 mummy. Anthrac- 

 nose mummies are 

 not. as extensively 

 wrinkled as black- 

 rot mummies, and 

 in the former the 

 outline of the origi- 

 nally affected area 

 may still be seen. 



FIG. 64. Grape-anthracnose 

 on Lindley canes. 



FIG. 65. Grape-anthracnose on berries. 



