mmon seemed to be in danger, as this quickly killing
disease appeared to be spreading. The limited work on this disease was
discontinued because of the war and the transfer of Mr. Crandall to
Peru. However, this summer Mr. Crandall and the senior writer spent two
weeks surveying some of the old infections and nearby territory, and
were pleased to note that the disease had made very little progress into
new territory. On several small areas where the disease was present some
six years ago practically all of the larger trees had been killed, but
some new small trees were coming up. At Chattanooga National Park, where
the wilt was rampant about six years ago, it is continuing to kill
trees, but many new ones are coming up. No northward extension of the
disease in Tennessee or North Carolina was noted in the limited time
spent in inspection.

[Illustration: Figure 4.--Small persimmon trees killed by the wilt.]

What does the disease mean to the grower of grafted persimmons, both
native and Oriental? The Japanese or Chinese persimmons do not grow as
well on their own roots, although they are quite safe that way as these
two species are very resistant to the wilt. In the East, most of the
Oriental persimmons are grafted on American root stocks, and trees in
one case were killed by the wilt fungus getting in on the susceptible
root stock. No attempts to control the wilt have been made, and these
recommendations are based on procedure with other diseases and on
knowledge of the spore production of this fungus. An owner of a valuable
planting of grafted trees in a region where the disease is present
should watch his trees for the first indication of trouble. The planting
will be safer, if there are no nearby native trees; and if native trees
are growing nearby and cannot be removed, they should be given a general
inspection. Prompt removal and burning of any infected trees found is
advisable. The fact that usually fungus spore production does not take
place until after the tree has been dead for a while makes the prospect
for control better than with most diseases. Care should be taken not to
bring in scions or trees from infected areas.

Most members of the Northern Nut Growers Association have only a few
grafted persimmon trees, usually located outside of the infected zone
and therefore in little danger. Persimmon scions and trees should not be
shipped from infected to healthy regions. The disease has not been
reported in nu