STOCKS AND RESISTANT VINES 65 



gravelly soils. It has some of the defects of the St. George 

 and is moreover more difficult to graft, and its only advantage 

 in California is that it is rather less susceptible to root-rot. 



"There are no better resistant stocks than Riparia gloire and 

 Riparia grande glabre, wherever they are put in soils that suit 

 them. They do well, however, only in deep, rich, alluvial 

 soils which are neither too wet nor too dry. Their grafts are 

 the most productive of all, and ripen their grapes from one to 

 two w r eeks earlier than the grafts on St. George. Their prin- 

 cipal defect is that they are very particular as to the soil, and 

 they never grow quite as large as the cion. The gloire is the 

 most vigorous, and the difference of diameter is less with this 

 variety than with any other Riparia. 



"The Mourvedre X Rupestris 1202 is extremely vigorous, 

 roots and grafts easily, and is w r ell adapted to rich, sandy and 

 moist soils. In drier and poorer soils its resistance is perhaps 

 not sufficient. 



"The most promising varieties for general use at present 

 seem to be the two hybrids of Riparia and Rupestris, 3306 

 and 3309. They have great resistance to the phylloxera, 

 root and graft almost as easily as St. George, and are quite 

 sufficiently vigorous to support any variety of vinifera. The 

 former is more suited to the moister soils and wherever there 

 is danger of root-rot, and the latter to the drier soils. In gen- 

 eral, they are suited to a larger variety of soils and condition 

 than perhaps any other varieties. 



" Riparia gloire should be planted only on rich, deep alluvial 

 soil containing an abundance of plant food and humus, what 

 would be called good garden land, such as river bank soil not 

 liable to overflow. 



" In most other soils Riparia X Rupestris 3306 is to be recom- 

 mended, except those that are rather dry, where 3309 is to be 

 preferred, or those which are very wet, where Solonis X Riparia 

 1616 is surer to give good results." 



