Northern Nut Growers Association, Report of the Proceedings at the Seventh Annual Meeting: Washington, D. C. September 8 and 9, 1916.
Science
Northern Nut Growers Association, Report of the Proceedings at the Seventh Annual Meeting: Washington, D. C. September 8 and 9, 1916.
Northern Nut Growers Association -- Periodicals; Nut trees -- Periodicals; Nuts -- Periodicals
The trees are quite vigorous in growth, considering their rather dwarf
type, reaching 10 or more feet in height at 6 to 8 years from the
germination of the seeds and with scarcely an exception bear regular and
increasing crops after the third year. Propagation of the most promising
varieties has been effected by grafting and budding on _Castanea
molissima_ seedlings as resistant stocks, but it cannot be said that
these processes, when performed under greenhouse conditions, give ideal
unions. It is hoped to make fairly extensive trials of _C. molissima and
C. crenata_ as stocks for field grafting the coming season.
But the most encouraging feature of these chinquapin-crenata crosses is
the excellence of their seedlings as grown from chance or
self-pollinated nuts. Fifteen direct or second generation seedlings and
one of the third generation have fruited to date. All have retained in
growth and fruitage the characters of their immediate parent and it
almost appears as if the good qualities of these hybrids may be
perpetuated from seeds, thus dispensing in a great measure with
vegetative propagation--always costly and uncertain with nut trees.
Several hundred of these seedlings are under observation and it scarcely
appears too much to hope that they may inherit the disease-resisting
character of their parents as well as other desirable qualities.
Selection work with a precocious strain of Japan chestnuts of apparently
pure type has been continued through 4 generations of seedlings after an
initial cross-pollination of two particularly desirable varieties had
been made in 1903. These seedlings show greater range of variation than
the hybrids with chinquapin, but all bear nuts of marketable value in 2
to 4 years from germination. None have been attacked by the Endothia
fungus, though many have constantly been exposed to infection.
Notwithstanding their extreme precocity trees of this Asiatic strain
grow steadily and if thickly planted in favorable localities may in time
produce timber of local value, but it is to the taller growing species
of middle China that we must look for material to replace our vanishing
native forest stands. The preservation in this country of the chestnut
as a nut-bearing tree appears assured in view of the progress already
made and it should not be too much to hope that resistant strains of the
timber type may yet be developed by systematic breeding experiments.
* * * * *
THE PRESIDENT: Inasmuch as the author of the paper is not present to
answer questions, the only thing that may be done is to ask further
contributions of knowledge in the same field. Has anyone any
contribution to make?
MISS LOUISE LITTLEPAGE: I would like to ask how long the chestnut tree
has been able to live with the blight?
DR. METCALF: Do you refer to the Asiatic ones or to the ones that grow
here in America?
MISS LITTLEPAGE: The American.
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