DR. MORRIS: Go to Rochester and get some there that bloom every year and that bloom later. My Bony Bush blossoms some three weeks later than the others, I presume. It is a bush that bears well every other year, apparently.
THE PRESIDENT: Are there any further questions about this large family of nut trees of which we have but a small corner of knowledge? If not, we may look to an adjournment.
First, I wish to announce that this afternoon we are going to devote to an excursion around the city, to see some of the most remarkable Persian walnut trees which I think may be found anywhere.
I am asked by Prof. Close to say that the Department of Agriculture has an exhibit of nuts on the fourth floor at 220 Fourteenth Street, Southwest.
Meeting called to order by the President.
THE PRESIDENT: Dr. Metcalf, Chief of the Bureau of Forest Pathology, of the Department of Agriculture, has been in charge of the investigations concerning the chestnut blight for a number of years.
DR. HAVEN METCALF: Mr. Chairman and Members of the Society: I will present, first, a few general facts regarding the present status of the chestnut bark disease, and, for the greater part of the information you desire, I will rely on you to ask me questions.
The chestnut bark disease is getting to be an old story, but that plant hyphenate, that objectionable imported disease, is more of a live issue today than it ever has been before. All my attention during recent months has been taken up with another imported plant disease, the white pine blister rust, of which you have heard, and which does not concern the special subject matter in which this Association is interested, unless, perhaps, you may be interested in the piñon nut as the piñon pine may ultimately be subject to attack by blister rust. However, this disease, like the chestnut blight, is an example of what a relatively harmless, or at least, not serious disease in a foreign country can do when it is permitted to get into the United States.
This brings us to the question of the origin of the chestnut bark disease, which, although the story has been told many times before, has been the subject of so much dispute that I probably had better recapitulate that matter. It has been proved beyond question that the chestnut bark disease is a native of eastern Asia, China, Japan and Korea; that it was introduced into this country in the '90's, upon diseased chestnut nursery stock. It was not critically observed until 1904, but the condition of trees which were observed at that time shows conclusively (provided the disease progressed in those early years as it has since) that it was introduced into the country as early as the late 90's. The final demonstration of the fact that the disease is a foreign disease and a native of Asia we owe to Mr. Frank Meyer, of the Office of Seed and Plant Introduction, of the Department of Agriculture. Mr. Meyer's observations are so interesting that I will pass around a few pictures illustrative of his observations in China, the first picture showing the country that is the home of the chestnut bark disease. The second picture shows a chestnut orchard in China where the trees have, with characteristic thrift, been planted around human burial mounds. The remaining pictures show how the chestnut blight acts in China--very differently from the way it acts in this country. In China, it produces, as the pictures show, definite cankers, which do not girdle the tree, which kill young trees occasionally, mutilate old trees, kill branches, but the cankers do not girdle the trees. That disease has been known in China we have no idea how many years, and, while it does a certain amount of harm, is said by Mr. Meyer not to be really serious in China. You can readily see, upon examining these pictures, that there is a sharp contrast in the behavior of the disease as observed in China and its behavior as observed in this country, where it will girdle a comparatively large tree and the fungus spread all through the bark, completely covering it, and doing that in a very short time. Of course, then, the chestnut blight is one of those cases of which we have so many, where a disease, passing to a new country, finds new surroundings, hosts more favorable to its development, and progresses rapidly.