covering with paraffin or some
combination of it, shade the scions on the south-west side, either by
tipping branches over them or some other way. Paper bags seem to absorb
the paraffin. Double grafting in the case of the Vest and the Weiker
will be tried. Whitewashing the stock to prevent sun burn will be used
where necessary. Several other experiments based on the idea of cellular
stimulation before the scions are placed in position will be tried.

Dr. M. B. Waite, of the Federal Insecticide and Fungicide Board, U. S.
Department of Agriculture, spoke as follows:

DR. WAITE: Some of you may recall that several years ago, when you were
meeting here in this hall, I gave you a paper on the nut diseases of the
northeastern part of the United States, and it would not be desirable to
go over that same ground again. At that time, we took up the bacteriosis
of the Persian Walnut, and filbert blight, and I outlined a program of
proposed treatment for the filbert blight. It might be interesting to
note here that Dr. Morris, and I believe also Mr. Bean, put that
treatment into practice with success. The situation still remains,
however, that we do not know of diseased plantings of any size. If we
find a real plantation of filberts we will be glad to attempt control
measures ourselves. I have planted about two dozen filberts and they
still remain free from the disease. There are very few local hazel nuts,
wild or cultivated, around Washington; but we understand that the few
hazel nuts are free from this disease.

There are two or three things I wish to mention. One is the repeated
inquiries reaching my office with regard to the non-filling of nuts,
mostly the cultivated nuts, sometimes the pecan, sometimes the black
walnut, and frequently the English walnut. The subject is a complicated
one and the disease is not one that we can put under the microscope and
diagnose at once. The trouble is due to a complex of varietal and
environmental conditions, the effect of the conditions of growth, of
soil fertility, temperature, soil, water and humidity, sunshine, etc.,
on that plant. Very often it is because people get the wrong variety and
do not know what they have. They may have an unproductive seedling.

On the other hand a good variety may fail to bear in a locality where it
is not suited. Very frequently the real lack is in soil fertility. Of
course the success of the pecan trees down South around pig pens is an
old joke to you ge