BULLETIN 197. GRAPE CULTURE IN CALIFORNIA. 135 



explanation of this difference has been advanced. The -most plausible 

 seems to be that the vines have been killed by overbearing. The vines, 

 in fact, have borne large crops before dying, and the only stock on 

 which they have remained healthy is Lenoir, which has a tendency to 

 induce light bearing with most varieties. 



The grafting of Muscats on resistant stocks has been little practiced 

 in California, but a few growers have vines which have been bending 

 several years on various stocks. 



One grower reports that Muscats on Lenoir, 10 years old, have given 

 fair results; another that they are weak, but bear well. One grower 

 in Tulare County has dug up his Muscat .vineyard grafted on Lenoir 

 because so many of the vines had died. Two growers report that they 

 have Muscats grafted on St. George which have been bearing well and 

 growing vigorously for from 3 to 6 years. Another grower reports 

 that his Muscats grafted on St. George and on Riparia Gloire have 

 given three good crops and are equally vigorous. These results are on 

 the whole encouraging. 



While the question of the selection of the best stock is not so pressing 

 in the case of raisin grapes as in that of wine grapes, because the 

 greater part of the raisin district is still uninfested by Phylloxera, it 

 will sooner or later be of vital importance to the industry. For this 

 reason a number of test plots have been started, with the cooperation 

 of growers in various sections where raisins are produced. 



In 1904 Muscat cuttings were bench grafted on the following re- 

 sistant stocks : 



Rupestris St. George. 

 Riparia Gloire de Montpellier. 

 Riparia X Rupestris 3309, 3306, 101". 

 Solonis X Riparia 1616. 

 Riparia X Berlandieri 33E, 34E, 157". 

 Rupestris X Berlandieri 301A. 

 Solonis X Cordifolia-Rupestris 202 4 . 

 Aramon X Rupestris No. 1. 

 Mourvedre X Rupestris 1202. 

 Lenoir. 



Several hundred rooted bench grafts on St. George and 1202 were 

 obtained and distributed to a number of growers in various districts, 

 principally in Fresno County. Smaller quantities on the other stocks 

 were obtained and distributed to a more limited number of growers. 



Notes taken on the quality of the bench grafts before they were 

 distributed were as follows: 



Muscat on St. George. Heavy growth, complete unions but large swellings. 

 Muscat on 101*. Good growth, complete unions, large swellings. 

 Muscat on 3306. Small growth, complete unions, small swellings. 

 Muscat on 1202. Heavy growth, complete unions, large swellings. 

 Muscat on Lenoir. Good growth, complete unions, small swellings. 



