Northern Nut Growers Association, report of the proceedings at the eighth annual meeting: Stamford, Connecticut, September 5 and 6, 1917
Science
Northern Nut Growers Association, report of the proceedings at the eighth annual meeting: Stamford, Connecticut, September 5 and 6, 1917
Northern Nut Growers Association -- Periodicals; Nut trees -- Periodicals; Nuts -- Periodicals
Last year in Washington I talked to you briefly about the Persian walnut
blight which we had definitely established as occurring in the East.
Last March the National Nut Growers' Association got very busy and so
amended the agricultural appropriation bill that all the funds for
national nut investigation were spent for pecan investigation, so it
left us up in the air for work in the north. We have, however, been able
to continue our observations with the Persian walnut blight and there is
only one further point to be emphasized and brought out at this time.
Those of you who have informed yourselves on this matter know that the
serious period of infection on the Pacific Coast is in the spring. It is
a blossom blight. During the past two years the period of infection in
the East has been in the late summer and it has not been serious on that
account. It is well known that in certain dry springs on the Pacific
Coast this blight does not occur and those years the growers are assured
of good crops. I think that this investigation, and the bulletin which
will soon be forthcoming, will not act as a discouragement for those who
want to plant Persian walnuts. I think it should not but should rather
encourage planting of these nuts. In spite of the presence of this
disease on the Pacific Coast the walnut industry has grown to be very
profitable, and if it proves that late infection is the rule in the East
there is every reason to believe that the disease will not be so
serious. That is practically the only walnut disease worthy of attention
at present.
The filbert disease is a fungus disease and Dr. Morris and others are
authority for the statement that it can be readily controlled by cutting
out.
DR. MORRIS: I will show this afternoon that it can be
controlled in a way.
DR. MCMURREN: We in the department have not been in a position
to do any work on the hazel blight so far. The hazel blight is
interesting in that it illustrates a principle in plant diseases which
it is well to know, that most of our serious plant diseases fall in one
of two classes; either a native disease on imported plants or an
imported disease on native plants. This filbert blight is very slight
on native hazels but very serious on imported European hazels. I do not
think there is anything more on the filbert disease, but Dr. Morris will
have some interesting things to show you this afternoon.
Public-domain text, read in full here on John Shaqi.
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