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In addition to the unsightliness caused by this 

 fungus, it is very injurious ; the mycelium permeates the 

 entire structure of the leaf, causing premature defoliation. 

 This causes the upper buds to expand before their time. 



PREVENTIVE MEASURES. 



Badly diseased leaves should be removed, as 

 spraying appears to produce but little effect in checking 

 the disease when it has once gained a foothold, as all 

 infection is nearly simultaneous and not progressing 

 throughout the summer, as is the case with mildew and 

 rust. All diseased leaves lying on the ground, also those 

 remaining on the bushes, should be collected and burned. 



Where the disease has existed spraying with 

 potassium sulphide or other fungicide should be com- 

 menced in the spring, and continued at intervals. 



ROSE LEAF-SCORCH (Septoria rosee). 



This disease is often neglected or considered as of 

 secondary importance ; nevertheless, when it occurs under 

 the form of an epidemic it is often very injurious, more 

 especially to nursery stock, which, when attacked for two 

 seasons in succession, rarely completely recovers. The 

 injury caused by the disease is due to the premature 

 defoliation it produces, diseased plants being often 

 quite leafless by the end of July. If the remainder of 

 the season is favourable a second crop of leaves is 

 produced, which leads to exhaustion, imperfectly matured 

 wood, &c. 



The fungus is confined to the leaves, and its 

 presence is first indicated by the appearance of minute 

 yellowish -green patches scattered over the surface of the 



