588 [ DISEASES OF THE VINE. 



which is so far not known to exist in these Islands, con- 

 sists in spraying with Bordeaux mixture, using slightly 

 stronger doses or more frequent sprayings than in the 

 case of blight. Spraying wita a solution of 2 to 3 % of 

 sulphate of copper also gives good results. 



White-rot, due to Coniothvrium diplodiella Sacc. = 

 Metasphaeria dip lo Hell a Berlese. = Charrinia diplodiella 

 Viala et Ravaz, is more widely distributed than black-rot, 

 but develops much more slowly. It attacks occasionally 

 the green shoots, but is generally confined to the berries, 

 which shrivel, take a dull white appearance, and dry up 

 gradually, in the meantime the rind becoming dotted 

 with the greyish white fructifications of the fungus. The 

 disease is occasionally met with in our vineyards, but 

 should it threaten to assume alarming proportions, it 

 may be checked by dustings with sulphur containing 3 to 

 5 / of sulphate of copper, or by spraying with 2^ / of 

 bisulphide of lime, made slightly acid by the addition 

 of a small quantity of sulphuric acid ; or with a 3 / 

 solution of bisulphide of magnesia. 



Anthracnosis of the vine. This disease which is due 

 to Sphaceloma ampelinum De Bary, is common enough 

 in all countries where the vine is grown, but is rare in 

 our vineyards. It attacks all the green parts of the 

 plant causing deep lesions on the young wood, owing 

 to which the produce of the following year is otten 

 jeopardized. The young shoots become infected early 

 in spring, especially near their union with the old wood, 

 producing spots which become cankerous and corrode 

 the tissues very deeply, and deform or desrroy the shoots, 

 the process being only stooped when the new tissues 

 become lignificd. On the foliage the disease develops 

 at the same tune, the black spots assuming also a gan- 

 grenous aspect corroding tin: entire thickness of the 

 tissues and causing perforations and lacerations, and 

 often the leaf dries up altogether. On the young 



