128 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



Mondeuse. One of the rows of this variety is grafted on Riparia 

 Grande Glabre and is very vigorous and bearing good crops. About 

 600 vines of the same variety are grafted on St. George and are even 

 more vigorous, but the crop is uneven. Owing to the vigor of the 

 growth many canes were broken by the wind in the spring, which 

 probably accounts for the variations in bearing. All the vines show 

 a considerable amount of coulure. 



Semillon grafted on St. George made good growth, but the crop 

 was unsatisfactory and much coulured. 



Ferrara on St. George (about 75 vines) showed excellent growth, 

 but only a medium crop and much coulure. 



Tokay on St. George (50 vines) was excellent. The vines were ex- 

 tremely vigorous and the crop good. The bunches were not compact, 

 but were well filled. The tendency of the stock to produce coulure in 

 this case had resulted simply in a thinning of the berries, which was 

 an advantage. 



St. Macaire on St. George has done very well, being vigorous, and 

 producing good crops with short pruning. 



Bench Grafts and Field Grafts. In starting this experiment plot 

 some of the rows were planted with bench grafts and the others with 

 rooted resistants, which were field-grafted the following year. This 

 gives us a good comparison of the two methods as regards the securing 

 of a good stand. 



Comparison of Bench Grafting and Field Grafting. 



Qti, a No. Growing No. Failed by 



5th Year. 5th Year. 

 FIELD GRAFTING (Zinfandel) 



Rupestris St. George. _. .. 39 = 68% 18 = 32% 



Riparia X Rupestris 3309 __ _*36 = 72% 13 = 28% 



Riparia X Rupestris 101 14 ._ _ 42 = 84% 8 = 16% 



Rupestris Martin _ 26 = 55% 21 = 45% 



Vialla_._ ... 16 = 70% 7 = 30% 



Total.. ..,__. -159 = 70% 67 = 30% 



BENCH GA,O- 



Mondeuse on St. George. _. __600 = 98% 14 = 3% 



Tokay on St. George ____ - 48 = 96% 2=4% 



Ferrara on St. George ____ ._ 70 = 93% 5=7% 



Total 718 = 97% 21= 3% 



As all these vines were growing close together on the same kind of 

 soil, and under the same management, the comparison speaks eloquently 

 in favor of bench grafts as a means of obtaining a perfect "stand." 



