BLACKBERRY DISEASES 161 
(See more complete discussion under Apple, page 108. See 
also Raspberry, page 398.) 
Fic. 45. — Crown-gall disease on blackberry canes. 
ANTHRACNOSE 
Caused by Glwosporium venetum Speg. 
The anthracnose of blackberries is the same as that on rasp- 
berries. The appearance of the disease on the various suscep- 
tible parts is similar in both cases. The causal organism is also 
the same. 
Recent investigations in Washington have shown that black- 
berry-anthracnose can be profitably controlled by spraying. 
Two applications are necessary: (1) spray just before the buds 
open with bordeaux mixture 5-5-50 to which has been added 
resin-fish-oil soap at the rate of one pound to fifty gallons of the 
spray. The resin is valuable in rendering the spray more 
M 
