18 MANUAL ,OF MODERN VITICULTUEB. 



large extent, it has generally disappeared in poor and 

 barren regions. On the whole, it gives satisfactory results- 



Fig. 11. Leaf of Jacquez (after M. Mazade). 



in fresh and fertile alluvial plains. Yiala and Eavaz mark 

 it 12 in the scale of resistance, which is established from 

 to 20 (absolute immunity). 



