10 July, 1917.] Anthracnose or Black Spot of the Vine. 



405 



last season, where vineyards on sandy soils suffered mosti, no doubt for 

 the reason that such soils long retain a damp surface, thus maintaining 

 a higher degree of moisture in the supernatent air than stiffer soil on 

 which a dry crust soon forms. In wet autumns graj)€S on sandy soils are 

 in similar manner more liable to suffer from mould, for their vegetation 

 is more luxuriant, and the abundant foliage and more tender tissues no 

 doubt favour the penetration of the parasite. 



Variety also plays a very considerable^ in fact a preponderating 

 part. Some sorts are exceedingly liable, yet others again are scarcely 

 ever attacked. Sultana is one of the most susceptible varieties, Zante 

 Currant seldom suffers, though curiously enough the first specimens 



received last season were Zante shoots. 

 Among table grapes Red Malaga is ex- 

 traordinarily liable, whilst Ohanez.Wal- 

 tham Cross, and Doradillo are often 

 severely attacked. Purple Cornichon, 

 however, is less subject to the disease. 

 I, W\/^^ j^ Among wine varieties the following suf- 



fer much : — Alicante Bouschet, Carig- 

 nane, Clairette, Grenache, Cabernet, 



Fig. 1. Fig. 2. 



Anthracnose in spring, before Anthracnose in spring : 



blossom, when total destruction of damage to canes and leaves, 



crop may result— a, b, c, lateral After H. Mares, 



growths resulting from the action of 

 the fungus ; d, damaged bunch ; e, 

 healthy bunch. After H. Mares. 



Riesling, Malbeck, Cinsaut', Palomino, Chasselas, &c. On the other 

 hand, the Pinots, Syra, or Shiraz, as we call it here, White Sauvignon, 

 Mafaro, Durif, &c., seem to be almost immune. The resisting power of 

 certain sorts was recognised by older European vinegrowers, perhaps, 

 more or less, unconsciously, with the result that resistant sorts were 

 regularly planted in situations suitable for the fungus, and this to such 

 an extent that prior to reconstitution Anthracnose was but little heard 

 of. Modern vineyards have been replanted with many varieties new 

 to the district. Vines have also been planted on low-lying situations 



