TWO DECAYS OF STORED APPLES.* 



H. J. EUSTACE 



. SUMMARY. 



I. A rot of apples, very similar in gross characteristics to the 

 " pink rot " caused by Cephalothecium rosenm, is produced by a 

 fungus of the genus Hypochnus. 



Inoculation experiments prove the fungus to be parasitic on apple 

 and pear. It is a wound parasite and cannot grow through sound 

 epidermis. 



Since only apples that were attacked by the scab were affected 

 with the rot, the importance of spraying to prevent scab is again 

 emphasized. 



II. During the winter it was noticed that a peculiar core decay 

 had developed in Baldwin apples. While the fruit appeared exter- 

 nally to be perfectly sound an area about the core was decayed. 



The trouble could not be traced to fungi or bacteria. It did not 

 seem to be influenced by the use or absence of fertilizers, nor to 

 have any relation to the kind or soil, nor to imperfect ripening of 

 the ffuit. It may have been caused by overbearing, by the unusually 

 wet season, or by the combination of these conditions. 



Baldwin apples placed in cold storage (30° F.) in October were 

 entirely free from even a trace of the decay in June. 



*A reprint of Bulletin No. 235. 



