106 ({RAPE CULTURE AND 



wood is used for scions grafted upon vigorous stocks, a crop 

 will generally be borne the same season, sufficient to give 

 some insight into the adaptation of the grape varieties to the 

 local climate. The crop will, of course, be belated. If it 

 matures well, nevertheless, it is positive proof that it will do 

 so still better when older; the berries will have less sugar and 

 more acid than in succeeding years. If, nevertheless, these 

 amounts are fairly satisfactory, it will convey the assurance 

 that when older the vines will yield a good product. It need 

 hardly be added that the older the stock the more nearly the 

 results so obtained approach the average result of future years; 

 yet excessive bearing of grafts should not be permitted, in or- 

 der to avoid weakening so as to spoil the "good half crop" 

 that may be expected the second year. 



Propagation of the Resistant Stocks. Experiments on this 

 important subject were made at the University some years 

 ago, and the results were published in October, 1885, in 

 Bulletin No. 34 of the College of Agriculture. The stocks 

 experimented on were the wild species riparia, ccstivalis^ Cal- 

 ifornica, and Arizonica, being those deemed of the greatest 

 importance at the time. The following is the report of Mr. 

 W. G. Klee, then head gardener of the agricultural grounds, 

 on this branch of work : 



In a previous report (1882) an account was given of some experi- 

 ments in growing wild grapevines from seed, as also of the influence of 

 carbon bisulphide upon the cuttings disinfected by means of its vapor. 

 It was deemed desirable to institute comparative experiments on the 

 facility with which the native Californian and Arizonian vines can be 

 grown from cuttings. For the sake of farther comparison, cuttings of 

 the summer grape ( Vitis cestivalis) and of the Northern and Southern 

 Hi verside grapes (Vitis riparia and cordifolia respectively) were also 

 planted under precisely similar circumstances. All the cuttings 'were 

 taken from vines growing in the garden of economic plants; and with- 

 out exception, wholly of the previous season's wood, which was very 

 thin, being on the average not more than one-sixth inch in diameter. 



The cuttings were all made about the same time, viz : at the end of 



