DISEASES OF THI VINE. ] 589 



bunches the cancerous spots may eat into the substance 

 of the stalk and destroy the bunch, the same spots with 

 a black margin being formed also on the berries which 

 are destroyed in the same manner. The disease is more 

 frequent in low-lying and badly drained vineyards, and 

 develops with greater intensity in wet springs 



The best preventive treatment for this disease con- 

 sists in hard pruning, and painting over all cankerous 

 wounds on the wood which cannot be removed, with 10 

 per cent, solution of commercial sulphuric acid, after- 

 wards washing the whole plant with a saturated solution 

 of ferrous sulphate. All primings should be removed at 

 once and burned. Dusting with sulphur containing 3 to 

 5 per cent, of sulphate of copper, or spraying with 

 Bordeaux mixture, may check somewhat the course of 

 this rebellious disease in spring and summer, but the 

 real treatment should be done in winter. 



Aureobasidinm vitis M.ont.~Exobandium vitis Vial a 

 et Boyer. This fungus occours in France, and in its 

 white variety (var. album Mont.) occurs in Italy. The 

 disease attacks the berries and the foliage. On the 

 berries are formed small brownish spots, with a depres- 

 sion of the cuticle ; on the cuticle are developed small 

 pustules containing cylindrical basidiospores, and in the 

 tissues underneath the cuticle is found the mycelium with 

 ramified hyphae of a golden yellow colour, the basidia in 

 the pustules being of the same colour. In the white 

 variety the colour is white. On the foliage the disease 

 forms yellowish white efflorescences, similar to irregular 

 spots with a chalky appearance, chiefly on the tender 

 surface of the leaf, on which are also formed the pustules 

 abovementioned. The leaf assumes a reddish colour 

 and becomes curled, and similar efflorescences are also 

 formed occasionally on the stalk of the bunches. This 

 disease which seems to be of little consequence, has not 

 been detected in these Islands, but should it make its 



