RESISTANT VINES AND HYBRIDS. 13 



RESPECTIVE VALUE OF AMERIGO X AMERICANS AND VINIFERA x AMERICANS. 



We have seen that in both of these groups of hybrids we may find 

 some varieties that are well adapted to our special conditions; in both, 

 we find a good resistance to phylloxera in the selected stock. Which of 

 these should we plant in our vineyards? 



It may be said in a general way that the Americo X American 

 hybrids, as well as the ordinary American grafting stocks, make the 

 Vinifera scions that are grafted on them bear more heavily than they 

 would if they were on their own roots. They come into full bearing 

 earlier, and generally the fruit will ripen a few days earlier. But the 

 variety of Vinifera grafted on these roots does not reproduce exactly 

 the type it represents when on its own roots: the grapes may be larger, 

 but there is a slight difference in the flavor and the per cent of sugar. 

 The Vinifera vines grafted on Vinifera X American hybrids retain better 

 their original qualities and have a better affinity between stock and 

 scion. 



The heavy bearing of the vines grafted on Americans or on Americo X 

 American will exhaust the land sooner; so that fertilizing will have to 

 be resorted to earlier, and it is a known fact that heavy fertilization 

 affects the quality of the grapes. 



From these remarks we may conclude that the American resistant 

 stock and their hybrids will probably be favored by those who look to 

 quantity more than to quality; while for the fancy wine grapes and the 

 better grades of table and raisin grapes the Vinifera X American 

 resistant stock will be chosen. The choice between the two groups is 

 mainly an economic question. 



A warning must be given regarding the selection of the stock. We 

 find hundreds of thousands of hybrids of each kind, but only very few 

 have been carefully selected. Because the Riparia X Rupestris 3306 or 

 3309 are good, it is by no means a reason for any " Riparia X Rupestris" 

 to be equally good. The number of the selection is as important, and in 

 fact more important, than the name of the stock. 



