132 REPORT OF THE BOTANIST OF THE 
Dr. Burrill, to whom Miss Detmers referred the matter, pro- 
nounced it a bacterial disease identical with pear blight. In the 
literature of raspberry disease this article of Miss Detmers has 
been frequently cited, but so far as we know there is no other 
published evidence that the raspberry is subject to a bacterial 
disease. Card’s® illustration of a raspberry cane affected with the 
supposed bacterial disease is a good illustration of the discolored 
areas which we believe to be due to Spherella rubina. 
It appears that raspberry canes in England are affected by a 
disease having similar symptoms. In the Gardener’s Chronicle,' 
an English periodical, an inquiry is answered concerning a rasp- 
berry disease producing black patches on the canes. Mr. George 
Massee is quoted as authority for the statement that the discolored 
patches are caused by a species of Dothidea, probably D. rose. 
SPRAYING EXPERIMENT AT CHARLOTTE. 
In the season of 1901 a Cuthbert raspberry plantation belong- 
ing to Dobson Bros., of Charlotte, N. Y., was injured by cane 
blight to the extent of two-thirds of the crop, as estimated by the 
owners. The writers first became acquainted with the plantation 
on May 21, 1902. At that date it appeared to be in good condi- 
tion; the canes were large and strong and the foliage good. The 
average observer would have said that there was an excellent 
prospect for a heavy crop; but close examination showed that 
many of the canes were already affected with cane blight and 
showing Coniothyrium pycnidia. In fact, canes here and there 
were already partially dead with the disease, and it seemed likely 
that there might be a severe outbreak of it a little later. 
Arrangements were at once made to conduct a spraying experi- 
ment in this plantation to ascertain if the crop of the present 
season could be saved in that way. Of course it was not expected 
that the disease could be checked in canes already infected; but 
it was hoped that the fruiting canes might be protected against 
further infection. 
The plantation contained about 14 acres, consisting of 44 rows 
185 feet long. Twenty-four rows were sprayed and the remaining 
6 Card, F. W. Bush Fruits. Fig. 46. The Mac Millan Co. New York. 1898, 
7 Gardeners’ Chronicle, Third Series, 11:631. 1892. 
