172 MANUAL OF FRUIT DISEASES 
REFERENCES ON CuEeRRY Brown-Rot 
Stewart, F.C. Notes on New York plant diseases, I. Cherry. Brown 
rot, Sclerotinia fructigena (Pers.) Schroet. New York (Geneva) 
Agr. Exp. Sta. Bul. 328 : 338-339. 1910. 
Clinton, G. P. Notes on fungous diseases, etc., for 1904. Cherry, 
Prunus avium. Brown rot, Sclerotinia 'fructigena (Pers.) Schrot. 
Connecticut Agr. Exp. Sta. Rept. 1904: 316-317. 1905. 
Arthur, J. C. Rotting of cherries and plums. New York (Geneva) 
Agr. Exp. Sta. Rept. 4: 280-285. 1886. 
Galloway, B. T. Brown-rot of cherry. U. S. Agr. Comm, Rept. 
1888 : 349-352. 1889. 
LEAF-BLIGHT 
Caused by Coccomyces hiemalis Higgins and C. lutescens Higgins 
/ 
It is probable that this disease is of foreign origin, the first re- 
port coming from Europe in 1884. Shortly thereafter the trouble 
became common in the United States. Special attention was 
given to the disease about 1890, at which time it was fairly well 
known to American nurserymen. It undoubtedly now prevails 
in all regions of the globe where the cherry is under cultivation, 
and is a pest both in the nursery and in the orchard. Sweet 
cherries, particularly mazzard seedlings, are very susceptible, 
whereas mahaleb seedlings are usually less so. It may be that 
the absence of the proper species of the pathogene accounts for 
the escape of the mahaleb seedlings. Early varieties are often 
much less affected than later-maturing ones. 
The damage caused by the cherry leaf-blight disease is not 
easily measured. It is believed to be one of the most important 
diseases affecting cherries in the nursery. Under conditions 
most favorable to the development of the causal pathogene 
the most susceptible types are completely defoliated. This 
results in an early loss of vigor by the young trees. Such trees 
are not able to mature their wood properly, and thus they 
withstand the dormant period with more difficulty and they. 
