BULLETIN 197. 



GRAPE CULTURE IN CALIFORNIA. 



125 



The only variety which looked .very weak was the Mataro on Rip. 

 Grande Glabre. This corresponds with European experience where it is 

 recommended to graft this variety only on vinif era X American hybrids, 

 such as Aramon X Rupestris No. 1 and Mourvedre X Rupestris 1202. 

 Where the growth is marked "fair" the slight lack of vigor could 

 generally be ascribed in part to the heavy crop. Exceptions to this 

 are the Cornichon and Huasco (Muscat of Alexandria), which not 

 only lacked vigor but also crop on Riparia. 



The bearing on the various stocks may be compared in the same 

 way in the following summary: 



Comparison of Crops on Various Stocks. 



This is hardly a fair comparison, for the reason that in most cases 

 the same variety was not grafted on all three stocks. In all cases, 

 however, where the same variety was grafted on both Riparia and 

 Rupestris St. George, with the exception of the Cornichon and Fresa, 

 the vines on Riparia had larger crops. This is shown by the following 

 comparison : 



Comparison of Crops on Riparia and Rupestris. 



Crop of Vines^n 



It should be noted that all varieties indiscriminately were pruned 

 short. If those which need long pruning when ungrafted had been 

 pruned long, the showing would undoubtedly have been more favorable 

 to the St. George. It is a very valuable characteristic of the Riparia, 

 however, that it enables us to obtain good crops with short pruning 



