New York AGRICULTURAL EXPERIMENT STATION. 419 
The other insects mentioned as attacking the peach are also 
lable to trouble the apricot. 
BLACKBERRY AND DEWBERRY DISEASES. 
ANTHRACNOSE. 
Blackberry anthracnose is caused by the fungus which affects 
raspberries in a similar way. For description and treatment, see 
page 459. 
LEAF-SPOT. 
(Septoria rubs Westd.) 
Description.— Blackberries, dewberries and raspberries are sub- 
ject to a leaf-spot disease caused by Septoria rubt. The small, 
pale spots of dead leaf-tissue finally become dotted with black 
specks, the pycnidia of the fungus. In some seasons the foliage 
is quite seriously injured by this disease. 
Treatment.— Goft™ has tried treatment with Bordeaux mixture 
and other fungicides, but the results were not encouraging. No 
successful line of treatment is known. 
RUST. 
Blackberry rust is caused by the same fungus which causes the 
rust of raspberries. For description and treatment, see page 460. 
BLACKBERRY AND DEWBERRY INSECTS. 
The principal injurious insects of blackberry and dewberry are 
the cane borer and the saw fly. These also attack the raspberry. 
They are discussed on pages 461, 462. 
CHERRY DISEASES. 
BLACK KNOT. 
It is claimed that the black knot of the cherry is caused by the 
same fungus as that which causes the black knot of the plum. If 
it is not the same fungus it certainly is so closely related that the 
ee 
144Goff, E. 8S. Journ. Myc., 7: -22. 
