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NEW Wenn AGRICULTURAL EXxPERIMENT STATION. 179 
Division OF VEGETABLE PATHOLOGY. 
WasuHincton, D. C., April 23, 1892. 
Dr. Peter Couuier, Director N. Y. State Haperiment Station, 
Geneva, N. Y.: 
Str.—In compliance with your request I herewith submit a 
brief report of work carried on by my assistant, Mr. D. G. 
Fairchild, at your Station during the season of 1891. Owing to 
the fact that the work is still in progress it seems best to mention 
simply the lines of work carried on and not the details. 
— Untrep Srates Department oF AGRICULTURE, 
Respectfully. 
B. T. GALLOWAY, 
Chief of Division. 
OvTLINE OF Work By Mr. Farronizp in 1891. 
At the request and through the co-operation of a large number 
of nurserymen of Western New York, a series of experiments 
with nursery stock was planned. Stock for this experiment was 
contributed by various individuals and consisted of the most sus- 
ceptible stocks of cherry, plum, quince, pear and apple to the 
total number of 9,500. 
These plants were treated with the two well-known fungicides 
Bordeaux mixture and ammoniacal solution, with a view of ascer- 
taining their effect on the stocks and their value as preventives of 
disease. ‘These diseases were leaf-blight of pear and quince 
caused by the fungus Entomosporium maculatum, “Lev. ; leaf- 
blight of plumb and cherry caused by Cylindrosporium padi, . 
Karsten ; and powdery mildew of the apple caused by Podosphaera 
oxycanthae (DC) D. By. 
The remarkable dry season prevented the appearance of several 
of the diseases and greatly retarded the appearance of others; 
and while various observations were thus prevented, Bordeaux 
mixture gave in all late treatments very encouraging results ; 
details of this experiment, however, which was planned to cover 
two years are reserved for publication until its close. 
In addition to the nursery experiment above outlined, an instruc- 
tive experiment with plum seedlings was made upon the place of 
Mr. O'Brian of Geneva. This experiment, the details of which 
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