Evaporated Kaspberries. 



561 



Anthracnose or cane-rust is much more to be feared than the 

 yellows. It is less apparent on the plant, and it may spread into all 

 portions of the patch before it is detected. The form of the disease 

 which ^the grower needs to be able to recognize is shown in Fig. 

 131. There are various pits or scars on the young cane, each one 



131.— Anthracnose on raspberry cane. 



probably a distinct infection of the disease. These discolored pits 

 interfere seriously with the health of the plant, causing the leaves to 

 turn yellow and the canes to die if the trouble is extensive. Much 

 of the drying up of berries on the bushes is due to attacks of 

 anthracnose on the canes or near the clusters, and some of the 

 death of plants commonly ascribed to winter-killing is attributable 

 to the same cause. The disease is particularly bad upon the black- 

 caps and the Shaffer. It first appears very early in the season upon 

 the newly starting shoots, and it generally continues to attack the 

 shoots as they increase in height. The first indication of the attack 

 which the grower will notice is the presence of small purplish 

 discolorations on the canes. The disease also attacks the leaves. 



36 



