DISEASES. 221 



the roses a bed in the rose garden which has had 

 a crop of annuals the preceding summer. 



In moist soils the stems and branches of rose 

 trees are often disfigured by the growth of moss. 

 They should be dressed in winter with 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 Ijright 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 a clay soil 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-eved ' 

 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- 

 manuring and over-luxuriance, and, as a matter 



