88 On the Prevention of Mildew. 



and which grows very high : it is now very common in the 

 shops of London, and my name has, I believe, been generally 

 attached to it. I prefer this variety because it is more 

 saccharine than any other, and retains its flavour better late 

 in the autumn ; but it is probable that any other late and 

 tall-growing variety will succeed perfectly well. It is my 

 custom to sow a small quantity every ten days till mid- 

 summer, and I rarely ever fail of having my table well 

 supplied till the end of October, though sometimes a severe 

 frost in the beginning of that month proves fatal to my later 

 crops. 



The Mildew of the Peach, and of other fruit trees, pro- 

 bably originates in the same causes as the Mildew of the 

 Pea, and may be prevented by similar means. When the 

 roots, which penetrate most deeply into the soil, and are 

 consequently best adapted to supply the tree with moisture 

 in the summer, are destroyed by a noxious subsoil, or by 

 excess of moisture during winter, I have observed the 

 Mildew upon many varieties of the Peach to become a very 

 formidable enemy. Where, on the contrary, a deep and 

 fertile dry loam permits the roots to extend to their proper 

 depth ; and where the situation is not so low as to be much 

 infested with fogs, I have found little of this disease : and in 

 a forcing house I have found it equally easy, by appropriate 

 management, to introduce or prevent the appearance of it. 

 When I have kept the mould very dry, and the air in the 

 house damp and unchanged, the plants have soon become 

 mildewed ; but when the mould has been regularly, and 

 rather abundantly watered, not a vestige of the disease has 

 appeared. 



