
          177

one is a worm which attacks the tree at the root, near the
surface of the ground, and often totally encircles it;  the other
is a disease usually denominated the yellows. <s>x x x </s>

* * * *
"Yellows.--This disease which commenced its raveges[ravages] in
New Jersey and Pennsylvania about the year 1797, and in New
York in 1801, has spread through several of the States, is
by farm more destructive to peach trees than the worm, and is
evidently contagious.  This disease is spread at the time
when the trees are in bloom, and is disseminated by the pollen
or farina blowing from the flowers of diseased trees,
and impregnating the flowers of those which are healthy, and
which is quickly circulated by the sap through the branches,
foliage and fruit, causing the fruit, wherever the infection
extends, to ripen prematurely.  That this disease is entirely
distinct from the worm is sufficiently proved by the circumstance,
that peach trees which have been inoculated on
plum or almond stocks, though less affected by the worm, are
equally subject to the yellows--and a decisive proof of its
being contagious is that a healthy tree, inoculated from a
branch of a diseased one, instead of restoring the graft to
vigour and health, immediately itself becomes infected with
the disease.  As all efforts totally to subdue it must require
        