64 MANUAL OF AMERICAN GRAPE-GROWING 



"Varieties of resistant stocks which will in all probability 

 be used in California are Rupestris St. George (du Lot), Riparia 

 X Rupestris 3306, Riparia X Rupestris 3309, Riparia Solonis 

 1616, Mourvedre X Rupestris 1202, Aramon X Rupestris 2, Ri- 

 paria gloire, and Riparia grande glabre. These are all varieties 

 which have given excellent varieties for years in Europe, and 

 have all been tested successfully in California. Among them 

 are varieties suitable for nearly all the vineyard soils of Cali- 

 fornia, with perhaps the exception of some of the heavier clays. 



"The only one of these varieties which has been planted 

 extensively in California is the Rupestris St. George. There 

 can be little doubt, however, that it will fail to give satisfaction 

 in many soils, and though we may not find something better 

 for all our soils it is probable that we will repeat the experience 

 of Southern France and find that in most soils there is some 

 other variety that gives better results. Without attempting 

 to describe these varieties, but to give some idea of their merits 

 and defects and of the soils most suited to each, the following 

 indications are given, based principally on the opinions of L. 

 Ravaz and Prosper Gervais, and on a still limited experience 

 in California : 



" The Rupestris St. George is remarkably vigorous and grows 

 very large, supporting the graft well even without stakes. 

 It roots easily and makes excellent unions with most vinifera 

 varieties. It is well suited to deep soils where its roots can 

 penetrate. Its defects are that it is very subject to root-rot, 

 especially in moist soils ; it suckers badly and it suffers from 

 drought in shallow soils. Its great vigor produces coulure with 

 some varieties and often necessitates long pruning. 



"In moist or wet soils 1616 or 3306 had given better results 

 in France and gives indications of doing equally well here. In 

 drier soils 3309 will probably be found preferable. 



"Aramon Rupestris No. 2 is suited to the same soils as 

 Rupestris St. George, and does particularly well in extremely 



