ENT: I had enough trouble without looking for more by mixing
walnut and apple trees. The walnut trees are small, merely the growth
from stubs repeatedly cut.

The next on our program is a paper by Mr. McMurran, of the Department of
Agriculture, upon the question of diseases of the English walnut. Mr.
McMurran.

MR. S. M. MCMURRAN: I am sorry that in this, my first appearance before
this Association I haven't a more optimistic and encouraging subject to
talk on than diseases. You men and women who are burdened with
establishing this industry have enough on you without contending with
diseases, and it was not my intention to talk upon diseases at this
meeting, but Mr. Littlepage, Mr. C. A. Reed, and Mr. Jones, and several
others, have been urging the matter strongly, which explains my
appearance at this time.

Walnut blight is a very common and serious disease on the Pacific Coast.
It may be a native disease, though it has never been reported on native
black walnuts, and it has proved a very serious menace to the seedling
English walnut groves on the Pacific Coast.

This little piece of work I want to tell you about tonight was done
through the co-operation of Mr. Jones and Mr. Rush, at Lancaster, Pa.,
and has just been completed within the last few days. I made a trip
through New Jersey, Delaware, and Pennsylvania, about the first of
August, and found a number of nuts that had all the appearance of being
infected with the walnut blight germ. They had the same appearance as
those nuts that you saw this afternoon in Georgetown. I brought them
back here and made cultures from them in the laboratory, and after that
the problem was absurdly easy. The germ was obtained without difficulty,
I obtained a pure culture, and then I went up to Mr. Rush's place, at
Lancaster, and made a number of inoculations, of which these few I have
here are typical. This nut that you see here was inoculated from a pure
culture along with a number of others, and the condition is as you see
it, after about a month. Inoculations were also made into twigs, and I
will pass these around for your examination.

The one marked, inoculated, has a little canker on it, and on the other
you will have difficulty in finding the needle punctures, but you will
see them if you look closely.

Now, I hardly know what to say about this disease at this time. As I
have stated before, my work has been in the South for the past several
years, and no work has been d