134 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



America- American Varieties. 



G. Riparia X Rupestris 3306. 



7. Riparia X Rupestris 3309. 



8. Riparia X Rupestris 101 14 . 



9. Riparia X Berlandieri 33E. 



10. Riparia X Berlandieri 34B. 



11. Riparia X Berlandieri 157 11 . 



12. Riparia X Berlandieri 420A. 



13. Rupestris X Berlandieri 219A. 



14. Rupestris X Berlandieri 301. 



15. Solonis X Riparia 1615. 



16. Solonis X Riparia 1616. 



, 17. Riparia X Cordifolia-Rupestris 106 8 . 



18. Solonis X Cordifolia-Rupestris 202 4 . 



Franco-American Varieties. 



19. Mataro X Rupestris 1202. 



20. Aramon X Rupestris No. 1. 



As might have been expected, nearly all of these varieties which 

 started grew vigorously in the rich soil of the region. Cuttings were 

 used in making the plantations, and the plots show strikingly the 

 differences in facility of rooting of the different stocks. The Berlandieri 

 and Berlandieri crosses rooted badly. The best of the latter in this 

 respect was the Riparia X Berlandieri 157 11 . 



The four most vigorous of the stocks were 1616, 1202, 3306 and St. 

 George. All of these in all the plots grew with extraordinary vigor 

 and rapidity. 



Seven other varieties grew with scarcely less vigor. These were 

 3309, 101 14 , 1615, Riparia Gloire, 157 11 , Aramon X Rupestris No. 1, and 

 106 8 . Four varieties, 33E, 34E, 202 4 , and Rupestris Martin grew with 

 fair vigor, but were distinctly inferior to the above. 



The only varieties of the list which made poor growth were Riparia 

 Grande Glabre, 219A and 301. 



Stocks for Muscat. The importance of the Muscat of Alexandria, 

 as the basis of our raisin vineyards, makes it highly important that 

 a suitable stock for this variety should be found as soon as possible. 



The invasion of the raisin vineyards of Spain by Phylloxera is com- 

 paratively recent, and little information is obtainable regarding the 

 use of resistant stock there. In a general way it is stated that the 

 usual resistant stocks are being used in the principal raisin-growing 

 regions of the Peninsula with success. The Muscat of Alexandria is 

 being grown to a limited extent as a table grape in southern France, 

 and is said to succeed on any vigorous stock. 



On the other hand, in South Africa, Muscat vineyards grafted on 

 Rupestris St. George, Riparia Gloire, Aramon X Rupestris No. 1, and 

 Rupestris Metallica have almost uniformly failed. After bearing 

 several good crops the vines have generally died. No satisfactory 



