
          194

19.  "Plum trees are not subject to any disease analogous
to the yellows.  But the apricot, standing in the neighborhood
of diseased peach trees, is subject to a sudden decline,
ending in death, which I can trace to no visible cause.
The growth of the branches becomes feeble; manuring, digging,
pruning, all have no effect upon the vigor of the tree.
Nothing will save it.  Yet I have not seen upon the apricot
the slender shoots and the premature ripening of the fruit,
which marks the disease of the peach.
[I have seen the shoots several times - E. F. S. 1890]
Nectarines are subject
to the disease and show it in the same manner as the peach."

20.  "The following fact gives reason to believe that the
disease commences in a tree between the month of September
and July folowing [following].  In the month of September I took buds
from a tree apparently in full health.  [Begin right brace] The buds inserted
into young stocks grew thriftily and without disease for three
years.  But the tree from which they were taken showed marks
of disease in July following the time they were taken." [End right brace]
very useful information!

21. There is no connection between yellows and curl.
Some of his conclusions are interesting.  He notes that "The
leaves of the terminal branches in the early stages of the 
disease perform their functions regularly."
[There is no doubt as to this.  My own observations
are conclusive. It seems first to be 
a local disease, then later on a general
one, involving the whole tree.]
        