PERMANENCY OF THE RASPBERRY PATCH 



257 



Diseases. — Several serious diseases affect the raspberry. Crown 

 gall (Fig. 185) and orange rust are quite common. Anthracnose 

 and cane blight are sometimes quite serious. Great danger from 

 these diseases arises from setting plants affected by them. Some 

 varieties are more immune to the disease than others. Spraying 

 remedies against these troubles are not commonly used. On the 



Fig. 184. — A form of wire trellis' used for supporting raspberry canes. (U.S.D-A.) 



other hand, the chief means of control is to eradicate the plants 

 when affected with orange rust or crown gall. Cut out the canes 

 and burn the prunings when affected by cane blight or by anthrac- 

 nose. 



Permanency of the Raspberry Patch. — With both the red and 

 the black raspberries it is necessary to avoid crowding of the plan- 

 17 



