118 



MANUAL OF FRUIT DISEASES 



and Nebraska. Such varieties as the Rhode Island, Fameuse, 

 Fall Pippin, Pound Sweet, Maiden Blush and Twenty Ounce 

 were damaged seriously by pink-rot under the older methods of 

 orchard practice. The recurrence of such losses, however, should 

 hardly be expected under the present conditions and methods of 

 management. However, the disease still ranks prominently 

 among the minor apple troubles, the fruit being affected on the 



tree and in storage. 

 The pathogene is fairly 

 common in cellar and 

 commercial cold storage, 

 especially on scabby 

 fruit. 



Symptoms. 



The term pink-rot is 

 slightly misleading in 

 that the affected tissue 

 is not pink. The name 

 has arisen from the 

 fact that the conidio- 

 phores and conidia of 



FIG. 32. Pink-rot following apple-scab. , , ,, . -, 



the pathogene are pink 



in color and stand exposed on the surface of the lesion. Pink- 

 rot very commonly follows apple-scab (Fig. 32). Around the 

 superficial, velvety scab spot the apple-tissue becomes brown, 

 sunken, bitter and rotten. Very early in the progress of the 

 disease, the fruiting stalks of the pathogene become evident, 

 at first white and then pink. These symptoms were ob- 

 served very commonly in the fall of 1915 on scabby Rhode 

 Islands, in New York both before and after harvest. The 

 decayed areas are circular in outline, and vary in diameter, 

 depending largely upon the size of the scab spot which it 

 surrounds, and upon the weather conditions. The lesion is 

 shallow, the affected tissue firm, corky and dry. Growers 



