New York Agricultural Experiment Station. 
365 
num, are to be found in the 1885 report, with illustrations. In the 
1886 report is an equally full account, based entirely upon new 
researches, of the cause of the premature dropping of the leaves. It 
is found to be due to the fungus known under the name of Septoria 
cerasina, the life history of which is traced out, excepting part of the 
details of one stage, which are supplied in the present report. The 
different parts of the fungus and the appearance of infected leaves 
are illustrated with cuts. Preventive and remedial treatment for the 
disease is suggested. 
Potato. — The present report contains a description of the scab of 
potatoes, the structure in health and disease of the skin of the tuber, 
and an account of researches toward ascertaining the conditions favor- 
ing the disease and possible prevention, partly by Mr. M. H. Beck- 
with and partly by the writer. There is a suggestion regarding the 
active agent in potato rot at page 257 of the report for 1885, and 
statistics are given by Mr. E. S. Goff in the same report regarding the 
percentage of decay of tubers belonging to different varieties 
grown upon the Station grounds. 
Tomato. — The rotting of ripe and green fruit is described and some 
of the fungi associated with the same are illustrated in the 1884 
report. The subject is continued in the two succeeding reports, but 
no final conclusions are reached. Additional facts and observa- 
tions are recorded by Mr. E. S. Goff in each report from 1882 to 1887 
inclusive. 
Lettuce. — In the 1885 report the mildewing or rotting of lettuce, 
due to Peronospora gangliformis, is described and illustrated; and in 
the same report a history and description of the rusting of the leaves 
by the fungus Septoria Lactucse is given with illustrations. 
Gooseberry. — The present report gives some account of the mildew 
of the gooseberry and a remedy for it. 
Strawberry. — An account of the comparatively rare trouble with 
strawberries in this country, due to the mildew, Sphserotheca Castag- 
nei, is found in the report for 1886. 
Cucumber. — The harmful spotting of the green fruit by a Cladospo- 
rium is recorded by Mr. M. H. Beckwith in the present report, with a 
note by the writer. 
Clematis. — The rotting away of the roots of clematis, causing a 
serious loss in the propagating house and among plants grown out of 
doors, was carefully investigated (1884) and found to be due to a 
fungus, the name of which was not determined. 
Oats. — Exact statistics are given in the 1884 report showing the per- 
centage of smut in oats as usually grown, and demonstrating that 
