THE 
AMERICAN NATURALIST. 
Vor. xv. — VOVEMBER, 1881. — No. 11. 
ON THE MICROSCOPIC AND GENERAL CHARAC- 
TERS OF THE PEACH TREE AFFECTED 
WITH THE “YELLOWS.” 
BY W. K. HIGLEY. 
SYMPTOMS OF THE YELLOWS, 
1. Premature Ripening —This symptom is one of the most 
common, although it is not by any means always noticed. In 
many cases it is very marked. During my investigation I have 
Corresponded freely with persons upon this subject, and many 
have stated that this is only a marked symptom in certain varie~ 
ties, prominent among which is “Stanlie’s late.’ Mr. John 
Williams, of South Haven, sent me specimens of this variety that 
ripened three weeks before the proper time. This symptom is 
not wholly confined to the peach affected with the yellows, as it 
1s also said to be produced by the borer. and curculio, but from 
all the evidence that I have been able to glean, I think that it can 
be safely stated that it is an infallible symptom when noticed in 
Some localities. I cannot agree with those who state that this 
symptom is only noticed in certain varieties, but think that 
although it may not always happen, yet when it does it is just as 
liable to be on one variety as another. It is, at all events, a thing 
to be looked after when the presence of this disease is feared. 
2. Color of the Peach—I have noticed particularly that affected 
Peaches, when opened, presented a very abnormal appearance as 
to the position, extent and size of the pigment spots. In the 
- Normal fruit bright red spots are often present near the pit and, 
perhaps, even toward the outer portions of the cellular part, 
VOL, XV.—No, XI. . 59 
