rseries, but it could occur there because it attacks small
trees.

[Footnote 13: Crandall, Bowen S. A new species of +Cephalosporium+ causing
persimmon wilt. Mycologia 37 (4): 495-498. 1945.]

+Thyronectria Disease of Honeylocust+

Honeylocust is widely distributed both in native stands and in
plantations. Some farmers plant this species or leave native trees in
their pastures for the pods, which have a high sugar content, up to 38
per cent. J. C. Moore, of the Alabama Agricultural Experiment Station,
reported preliminary tests indicating a per-acre yield of livestock feed
equal to that of oats.

In many areas the growth of honeylocust is seriously affected by a
canker and twig fungus, _Thyronectria austro-americana_. The disease
often kills many twigs and branches and sometimes results in death of
the tree. In most areas it causes only slight injury. Bowen S. Crandall
and Jesse D. Diller have made a few observations on the prevalence and
damage by this disease, which is present from New England south into the
Gulf States and west into the Great Plains States.

The fungus causing this disease is morphologically somewhat similar to
the chestnut blight fungus, having two spore stages produced in
reddish-brown pinhead-size fruiting bodies on the bark. Cankers are
produced on the smaller branches, but they usually are not noted until
some of the affected ones wilt and die. In the exposed outer wood of a
branch cut above or below the canker there are reddish-brown streaks
several inches long, indicating that the fungus has grown in the
vascular system.

As no control experiments are known, recommendations are based on
general knowledge of sanitation. If an owner has only a few valuable
planted trees, he should cut off the diseased parts a foot or more back
from the lower edge of the affected bark and burn or bury them in the
soil. If he has many trees scattered over extensive pasture areas, it is
questionable whether any action other than elimination of the more
susceptible trees is justified. We will be interested in the results
obtained from control work.

* * * * *

President Davidson: Now I will turn over the chairmanship of the meeting
to Mr. Chase, who will have charge of the Round Table Discussion.

Round Table Discussion on Chestnut Problems

SPENCER B. CHASE, Presiding

_Panel of Experts_: Max E. Hardy, Carroll D. Bush, H. F. Stoke, G. F.
Gravatt, J. C. McDaniel