396 



Bulletin 75. 



by red spots and streaks which often run through to the pit. 

 When the attack is slight, these red streaks in the flesh may be 

 faint or even almost absent, but the external spots are character- 

 istic. The illustration (Fig. 3) shows a diseased peach. In addi- 

 tion to these marks upon the peach, the fruit generally ripens pre- 

 maturely, although I have seen cases in which the spots were 





<<'i- , 



3, Yellotvs peach. 



present upon fruit ripening in its normal season. On the other 

 hand, yellows peaches sometimes ripen six weeks in advance of 

 their season, particularly after the dissase has run a year or two. 

 Mere prematureness is not an indication of yellows. I have re- 

 peatedly been shown trees, during the past season, which were 

 said to have yellows because the fruit ripened prematurely, but 

 which were suffering only from borers, neglect or drouth. These 

 peaches lacked entirely the bright red spots of the yellows. Yel- 

 lows peaches are usually poor in quality, particularly in sweetness ; 

 yet when the attack is recent and the fruit is not markedlj^ pre- 

 mature, the quality may not seriously suffer. In the second year 

 of the visible attack, however, the quality of the fruit is percepti- 

 bly low. 



Yellows generally appears at first upon a part of the tree only. 

 Sometimes only one or two peaches may show any indications of 

 the^ disease, and the tree may appear to be perfectl}^ healthy. 



