154 DISEASES OF CROP-PLANTS 



formation is weak and slow. It has been also observed that, 

 at the other extreme, very quick-growing shoots produced on 

 tea after severe pruning develop cracks in the bark which are 

 liable to infection. 



Control. 



Spraying with Bordeaux mixture carried out early in the dry 

 season has proved more or less effective against the disease, and 

 is the most satisfactory method of control yet found. The 

 means of permanent remedy, adopted with great success in the 

 case of tea, must be sought in close attention to drainage, culti- 

 vation, and manuring. 



