DISEASES. 217 



lime and soot, equal quantities, made into a thin 

 paste. 



A species of mildew, only of an opposite colour 

 to the first named, often makes its appearance on 

 some of our finest kinds of autumn roses. How 

 detestable it is to see on some bright sunny 

 morning in August, when the harvest mist has just 

 lifted his curtain, leaving every leaf, and bud, and 

 flower sparkling with beauty how chilling to the 

 roseist to see on his fine trees of Senateur Vaise or 

 Grloire de Santenay, a few leaves with round black 

 blotches on them, increasing daily till the leaves 

 drop off exhausted. There seems no immediate 

 cure for this fatal disease ; I have tried the 

 mildew applications, but without effect : it is more 

 rife in shallow, dry, or old exhausted soils, than 

 in deep clays with deep culture. Annual removal, 

 deep culture, and rotation will prevent its coming. 



Among roses of the old school, such as some of 

 the Hybrid Bourbons and others, ( green-eyed ' roses 

 were very common : with our improved popular 

 sorts, this green centre is rarely seen. When it 

 used to be common in our rose gardens, it caused 

 much discussion, some imputing it to over-manur- 

 ing and over-luxuriance, and, as a matter of course, 

 some to the converse. I only remember being 

 much amused with the controversy, for in the heat 

 of it I discovered a group of old varieties of Eosa 

 gallica growing under some old elm trees literally 

 stawed to death. 



