CHAPTER VII 
CURRANT DISEASES 
THE currant is affected by but few diseases. Among the 
more common ones are: Mycospherella leaf-spot, anthracnose 
and cane-blight. For the past few years currants, especially 
black kinds, and gooseberries as well, have attracted the special 
attention of the plant pathologist on account of the European 
rust disease. This fungous trouble, while of no direct impor- 
tance on the currant, is very destructive to the white pine ; on 
the latter host it is known as the white pine blister-rust. To 
currant-growers particular attention is called to the account of 
European rust, page 212. 
MycosPH@RELLA LEaFr-Spor 
Caused by Mycospherella Grossularie (Fr.) Lind. 
Both currants and gooseberries are commonly affected by 
this leaf-spot. .In certain regions, for example New York, the 
black varieties of currants, such as the Naples, are said to be 
more resistant than the red and white currants. On the latter 
kinds the foliage is more liable to drop when affected by this 
trouble. 
The disease was first given special attention in Massachusetts 
in 1886; five years later it was an object of study in Iowa. It 
was rather common in New York in 1899 and 1900, but the 
damage wrought was not serious. The disease ordinarily occurs 
wherever the currant and gooseberry are grown. In some 
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