172 MANUAL OF FRUIT DISEASES 



REFERENCES ON CHERRY 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. Bui. 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 



