VOLUME VI, 
No. 4. 
JOURNAL OF MYCOLOGY. « 
EDITED 1JY 
THE CHIEF OF DIVISION AND HIS ASSISTANTS. 
ISSUED 
April 30, 1891. 
CHIEF, 
13. T. GALLOWAY. 
ASSISTANTS, 
Eitie A. Southwortii. David G. Fairchild. Erwin F. Smith. 
EXPERIMENTS IN THE TREATMENT OF PLANT DISEASES. 
By B. T. Galloway and D. G. Fairchild. 
fart II. 
TREATMENT OF PEAR LEAF-BLIGHT AND SCAB IN THE ORCHARD. 
Dr. W. S. Maxwell’s orchard, where these experiments were con¬ 
ducted, is situated near Still Pond, Maryland, in a region known as the 
Eastern Shore. This region is justly celebrated for its abundant yields 
of fruit, pears in particular being one of the most profitable crops. Of 
late years, however, this fruit has suffered greatly from the attacks of 
two diseases commonly known as leaf-blight and scab. These maladies 
are not confined to the Eastern Shore. On the contrary, we find them 
causing more or less damage wherever the pear is grown, so that these 
remarks are in a measure applicable to the whole country. 
The leaf-blight and scab are caused by two very different species of 
fungi, which have received the rather formidable names of Emtomospo- 
rium mavulatum , Lev., and Fusicladium pirinum , (Lib.) Fekl., respec¬ 
tively. 
The Entoinosporium has already been made the subject of some in¬ 
vestigations by this Division,* but no work in the line of preventing the 
injuries of the Fusicladium have, previous to this year, been under¬ 
taken. Dr. Maxwell being a heavy loser every season from both the 
diseases, and having placed his extensive orchards at our disposal, it 
was decided to carry on the work at his place. 
* Circular No. 8, 1889; Bulletin No. 11, 1389. 
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