FUNGI IMPERFECTI 



355 



FIG. 173. RASPBERRY CANE BLIGHT. (Photograph by F. C. Stewart) 



Stewart states : 



The whole cane may be involved or only a portion of it. Often a single 

 branch is killed while the remainder of the cane continues alive and appar- 

 ently normal. In the majority of cases only a part of the cane dies. With 

 black caps the disease frequently starts in the old stub left in pruning. From 



