1881.] the Peach Tree affected with the“ Yellows.” 853 
other branches, that but little is left to form the fruit, and thus the 
‘peaches grow smaller and fewer in numbers after the first prema- 
ture ripening until the tree dies! 
As so many other causes, as a direct effect, produce a diseased 
condition of the leaves, they can hardly be accepted as a true 
symptom of the yellows, unless in connection with other marked. 
indications. 
Perhaps I have said more upon the symptoms of the yellows 
than many would consider necessary, but it is well known that 
the physician diagnoses a disease from the symptoms, and then 
looks for that which will produce the cure. In plain words, the 
indications give him a clue to the cause and what will afterwards 
be essential for the cure. To this end I desire to call forth from 
the practical and scientific fruit growers a report of what they have 
noticed, whenever it has been their privilege to observe the symp- 
toms and action of this disease, hoping that I may glean from 
these reports something that may guide us in our work. 
Nearly every species of parasitical fungi has its special host, 
often carrying this so far as to refuse to grow upon a closely- 
allied species or variety. Many others will grow upon allied 
hosts provided the true host is removed. But this does not seem 
to be the case with the fungus that we are dealing with at pres- 
€nt; it is characteristic of the peach alone. Hill’s Chili seems to 
Suffer the most, but still it clings to other varieties just as tena- 
Ciously when once introduced into an orchard. There is no 
doubt but that we can safely say “no variety is exempt.” 
SOIL AND PREVENTIVES. 
Does the soil have any effect upon the yellows? In answer to 
this question, I should say, directly no; but indirectly it does. 
I am quite positive that if the orchard is kept in the proper 
State of cultivation it will not be as apt to contract the disease, 
although I cannot say that this is a preventive in the face of all 
the evidence to the contrary. It is a well known fact, however, 
that if the digestive, circulatory and respiratory organs in man 
are in their proper state, there is not near as much danger of the 
body contracting a disease. I believe that this is, to a great extent, 
also characteristic of the vegetable kingdom. Thus the right 
0od and care, or in plain words the right cu!tivation, fertilization 
and pruning, may, to a great extent, aid the pomologist in his 
