DR. MORRIS: You see the same thing at the Experiment Station in southern California. One tree will be absolutely resistant to blight; the other will be all killed. And down at Whittier, perhaps, seven-tenths of all the trees will be badly affected with the bacteriosis, and the others not very much affected, so that, apparently, it is largely a matter of this cynips, which introduces the bacteria, selecting certain trees. Certain walnuts are very much affected, and the involucre looks very much like that of these nuts (showing specimens), but, on examining them, I found a very large number of small larvae beneath the involucre. I sent some of them to the Connecticut Experiment Station and some to Washington, but they didn't tell me what they were. Those same larvae I found in one black walnut on my place, which is very heavily infested with them. Most of the nuts drop because of the injury to the involucre. I haven't determined the species yet. I don't know whether the larvae come first and the bacteriosis second, or whether it's the other way around.
THE PRESIDENT: Are there other persons who wish to give themselves a chance of asking Mr. McMurran a question? I have a question that is troubling me. Perhaps the house can throw light upon it. I had a number of Persian walnuts, Vrooman Franquette and Mayette, grafted on black, and by the Fourth of July they were growing nicely, with tops all the way from four to twenty-four inches long, and then the tip got black and the blackness went down. I sent a sample to Mr. McMurran. The leaves first died and then the twigs.
MR. MCMURRAN: I received that, but it was so dried when I got it it was impossible to make anything out of it. I have seen the same thing on pecans, only in those cases the leaves just got black and fell off, and we never have been able to assign a reason for it.
THE PRESIDENT: Am I the only man that has had that experience?
A MEMBER: I had this year the same thing on the Vrooman Franquette, but it recovered and has made excellent growth since.
MR. MCMURRAN: Have yours subsequently lived?
THE PRESIDENT: No, they subsequently died. (Laughter.)
MR. J. F. JONES: I had that experience this summer. The new growth was very tender and took blight very readily.
THE PRESIDENT: Well, this doesn't appear to be blight.
MR. JONES: If the English walnut starts late and the tender growth comes in the hot weather, the sun will kill it.