CURRANT DISEASES 209 



senate) is equally effective. It is essential to make the first 

 application of the fungicide before the discharge of any asco- 

 spores ; as previously noted, this occurs during the middle of 

 May. It is further essential to keep the foliage protected 

 throughout the summer. Make the first application when the 

 leaves are unfolding; apply the fungicide at intervals of ten 

 to twenty days until five or six sprayings have been made. 

 The interval may be lengthened and the number of applications 

 reduced in dry weather. In a wet season more frequent 

 applications are necessary. 



Since the fungus hibernates in the fallen leaves, it seems 

 logical that these should be destroyed by plowing or some 

 other means. However, there would in all cases be enough 

 leaves to act as an abundant source of trouble. 



REFERENCES 



Stewart, F. C., and Eustace, H. J. An epidemic of currant anthracnose. 



New York (Geneva) Agr. Exp. Sta. Bui. 199 : 64-80. 1901. 

 Jackson, H. S. Currant diseases. Anthracnose. Oregon Crop 



Pest and Hort. Bienn. Kept. 1911-1912 : 266-267. 1913. 

 Dudley, W. R. Anthracnose of currants. Cornell Univ. Agr. Exp. 



Sta. Bui. 15 : 196-198. 1889. 



Stewart, V. B. Some important leaf diseases of nursery stock. An- 

 thracnose of currants and gooseberries. Cornell Univ. Agr. Exp. 



Sta. Bui. 358 : 194-198. 1915. 

 Clinton, G. P. Currant anthracnose. Connecticut Agr. Exp. Sta. 



Rept. 1913 : 12-13. 1914. 

 Stewart, V. B. Dusting nursery stock for the control of leaf diseases. 



Experiment for the control of the leaf spots of currants. Cornell 



Univ. Agr. Exp. Sta. Circ. 32 : 8-9. 1916. 



CANE-BLIGHT 



Caused by Botryosphceria Ribis Grossenbacher and Duggar 



Currant cane-blight or necrosis, also known as wilt and 

 blight, affects chiefly the cultivated varieties of the red currant 



