292 



Vineyard Culture. 



fatal to the plant, is also due to the bad state of the 

 roots. 



Blight. This affection presents the following char- 

 acteristics : the leaves, the young shoots, and even the 

 berries, assume a greyish tint, owing to the cuticle of 

 these parts splitting, and drying up. The growth is 

 completely arrested, and the berries split instead of rip- 

 ening. Vine-dressers refer this alteration either to the 

 cold rains of summer, following warm weather, or to a 

 too abundant crop the year preceding. This disease is 

 made to disappear by fully manuring the plants affected, 

 and making them barren for one year. 



O'idium, or White Leprosy. Of all the diseases at- 

 tacking the vine this is certainly the most to be feared. 



[FlG. 115.] Vine At- [FiG. 116.] Fruit At- 

 tacked by Leprosy. tacked by Leprosy. 

 This affection presents itself under the form of an ef- 

 florescence of a greyish white, first on the leaves 



