unch"
for the following reasons: (1). The term is very descriptive of the
symptoms of the disorder. (2). It is the accepted name of a disease of
pecan and hickory species that is very similar if not identical to the
one occurring on walnut species. (3). The names "brooming" and
"witches'-broom" have already been applied to diseases caused by fungi.]

[Footnote 14: Waite, M. B. Notes on Some Nut Diseases with Special
Reference to the Black Walnut. Ann. Rept. Northern Nut Growers Assoc.
23:60-67, 1932.]

[Footnote 15: Becker, Gilbert, My Observations on Witches Broom Disease
of Black Walnut Trees. Annual Report Northern Nut Growers Assoc.
31:106-109, 1940.]

[Footnote 16: Hutchins, Lee M., and Wester, Horace V.
Graft--transmissible Brooming Disease of Walnut (Abstract.)
Phytopathology 37: 11, Jan. 1947.]

[Footnote 17: Gravatt, G. F., and Stout, Donald C. Diseases Affecting
the Success of Tree Crop Plantings. Ann. Rept. Northern Nut Growers
Assoc. 39: 60-68. 1948]

WEDNESDAY MORNING SESSION

A Forester Looks at the Timber Value of Nut Trees

CHARLES S. WALTERS, _Forestry Department, University of Illinois_

What I am going to say will apply mostly to black walnut since it is one
of our most valuable timber trees, but it also will apply to other
species like hickory, pecan, persimmon. I've never seen papaw or hazel
nut large enough for timber, but the Persian walnut has some value and
the Chinese chestnut is a fair timber tree. All of these species should
be commercially useful if there is sufficient quality and volume
involved to warrant a sale.

What I have to say may not apply five years from now. Persimmon used to
be the main source of material for golf club heads and shuttles for the
textile industry. It no longer is.

Today golf club heads are being made of "Compreg," a wood which has been
impregnated with phenolic resins and cured with heat. The resin is
similar to Bakelite. Thin sheets of wood are glued together to build up
the head, rather than using a single solid piece, and it makes a
considerably better golf club head. The developments in wood use are
progressing just as in many other fields. What the wood specialists are
trying to do is to take low quality material and change it over to a
form which is suitable for many uses for which high-quality expensive
material is now used. The timber buyer now wants a tree of long, clean,
bole with few knots, of large size,--at least 16 inches in dia