12 CIRCULAR 112, BUREAU OF PLANT INDUSTRY. 



and West Virginia during the fall of 1911. According to numerous 

 observations made by the writers, fruit picked at the proper time, 

 or rather early, and rushed into cold storage with only two or three 

 days' delay, and consumed within a few days after removal from 

 storage, will not develop the disease to any serious extent. Fruit 

 of susceptible varieties kept in common storage or delayed in reaching 

 cold storage usually becomes affected. The disease has been par- 

 ticularly annoying to fruit growers who have attempted to keep prize 

 specimens of the Jonathan in cellar storage for exhibition purposes. 

 The growers of Esopus (S pitzenberg) in Oregon and Washington 





Fig. 1.— Esopus (Spitzeriberg) apple showing early stages of the Jonathan fruit-spot. 



have perhaps suffered most from this trouble, the spots often develop- 

 ing on the fruit en route to the eastern markets. The writers have 

 observed large quantities of affected fruit from the Northwest in the 

 markets of Washington and New York. 



The Jonathan is the most susceptible variety grown in the east, 

 and its commercial standing is greatly impaired on account of this 

 weakness. The disease is now rather commonly known among 

 apple growers as the "Jonathan spot," and for that reason the writers 

 have adopted the name "Jonathan fruit-spot." The Esopus is 

 almost, if not quite, as susceptible to the disease as the Jonathan, 

 and the Yellow Newton apparently ranks third in degree of suscepti- 



[Cir. 112] 



