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 44-50 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 time 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. Bul. 97: 3-18. 1910. 
Jackson, H.S. Anthracnose of raspberry, blackberry, loganberry, etc. 
Oregon Crop Pest and Hort. Bienn. Rept. 1911-1912 : 261-263. 
1913. 
Scribner, F. L. Anthracnose of the raspberry and blackberry. U.S. 
Agr. Comm. Rept. 1887 : 357-361. 1888. 
Paddock, W. Anthracnose of the black raspberry. New York 
(Geneva) Agr. Exp. Sta. Bul. 124: 261-274. 1897. 
Detmers, Freda. Anthracnose of raspberry and blackberry. Ohio 
Agr. Exp. Sta. Bul. 4 (no. 6): 124-126. 1891. 
Burkholder, W. H. The perfect stage of the fungus of raspberry 
- anthracnose. Phytopath. 4:407. 1914. 
CaNnE-BLIGHT 
Caused by Leptospheria Coniothyrium (Fekl.) 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. 
