APPLE 



DISEASES OF SPECIAL CROPS 

 PoMACEOus Fruits 



Bitter rot, ripe rot {Glomerella rufomaculans (Berk.) 

 Spaul. & von Schrenk). Untrue to its. two common names, 

 this malady does not always render apples bitter, though 



Fig. 21. — Apple bitter rot (glomerellose) in early stage showing pycnidia. 

 After Scott. 



this is sometimes the case ; nor is the disease always lim- 

 ited to ripe fruit. Its effect is seen upon both the fruit 

 and the twig. 



Upon the fruit it produces a soft, wet, or in later stages 

 corky, more or ■ less dry, brown, tan-colored, or black, 



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