106 ReEporRT OF THE BOTANIST OF THE 
gave an average yield of 1854 pints per row, while unsprayed 
rows in the same plantation averaged 2033 pints. The spraying 
might have been more successful had it been commenced the pre- 
vious Ssuimmer. 
No definite and effective line of treatment has yet been estab- 
lished. Among several precautions to be observed the most 
important are: (1) To secure healthy plants with which to 
start the plantation; (2) to remove the old canes immediately 
after the fruit is gathered. 
II. Yellows is a name proposed for a raspberry disease which 
is believed to be chiefly responsible for the so-called running out 
of the variety Marlboro in the Hudson Valley. It is charac- 
terized by stunted growth, mottled yellowish-green foliage and 
dry, insipid fruit. The cause and remedy are both unknown. 
In an experiment at Marlboro, N. Y., plants sprayed thirteen 
times were as much affected as unsprayed plants. 
INTRODUCTION. 
It is the intention of the writers to publish, at some future 
time, a complete account of the diseases of the cultivated rasp- 
berries, blackberries and dewberries. Studies on this subject 
have been in progress about three years. It will be at least a 
year, and perhaps longer, before the work can be completed, and 
for that reason it is thought best to publish now some of the 
results which, it is believed, will be of interest to fruit growers. 
I. RASPBERRY CANE BLIGHT. 
HISTORY, DISTRIBUTION AND BIBLIOGRAPHY. 
Raspberry cane blight first came to our attention in 1899 
while prosecuting a fruit-disease survey of the Hudson Valley. 
Although abundant and destructive and evidently not new to 
fruit growers, the disease was, nevertheless, entirely unknown to 
science at that time. It seems strange that so conspicuous and 
widespread a disease should so long have escaped the attention 
of plant pathologists. 
In the season of 1900 our observations were extended to cen- 
tral and western New York where the disease was again found 
