410 MANUAL OF FRUIT DISEASES 



son. Short rotation should be practiced. Ordinarily it will 

 not pay to keep a plantation of black raspberries after it has 

 produced its third crop. Clean, anthracnose-free plants should 

 be set. All weeds should be kept down ; this operation tends 

 to reduce the relative humidity about the canes; moisture 

 favors the fungus. 



It is possible to keep a plantation relatively free from the 

 disease by the use of bordeaux mixture 4-4-50 in the spring. 

 The applications should be made as follows : (1) before the 

 leaves appear ; (2) when the leaves are well developed and by 

 the tune the shoots are six inches high; (3) just before the 

 blossoms appear. Whether subsequent applications are needed 

 will depend on the weather and the severity of the disease. 

 Later sprayings are made at ten-day intervals. 



REFERENCES 



Lawrence, W. H. Anthracnose of the blackberry and raspberry. 



Washington Agr. Exp. Sta. Bui. 97 : 3-18. 1910. 

 Jackson, H. S. Anthracnose of raspberry, blackberry, loganberry, etc. 



Oregon Crop Pest and Hort. Bienn. Kept. 1911-1912 : 261-263. 



1913. 

 Scribner, F. L. Anthracnose of the raspberry and blackberry. U. S. 



Agr. Comm. Kept. 1887 : 357-361. 1888. 

 Paddock, W. Anthracnose of the black raspberry. New York 



(Geneva) Agr. Exp. Sta. Bui. 124 : 261-274. 1897. 

 Detmers, Freda. Anthracnose of raspberry and blackberry. Ohio 



Agr. Exp. Sta. Bui. 4 (no. 6) : 124-126. 1891. 

 Burkholder, W. H. The perfect stage of the fungus of raspberry 



anthracnose. Phytopath. 4 : 407. 1914. 



CANE-BLIGHT 



Caused by Leptosphceria Coniothyrium (Fckl.) Sacc. 



This disease was first observed in 1899 in the Hudson Valley, 

 State of New York. Until that time it was wholly unknown 

 to science, although it was then abundant and destructive. 



