650 EXPERIMENT STATION RECORD. 



nothing to be desired, but their vigor when grafted with the Gamay variety varied 

 considerably. Certain hybrids of RuiDestris stood first in vigor, while the least vigor- 

 ous were those on the Riparia varieties. The following grouping of the varieties 

 with regard to vigor of growth is given for 12 of the stocks used: (1) Aramon-Rupes- 

 tris Ganzin No. 1, Gamay Couderc; (2) Rupestris du Lot, Rupestris Metallica; 

 (3) Rupestris Martin, Rupestris Ganzin, Rupestris Fortworth ; (4) Riparia tomentose, 

 Solonis; and (5j Riparia Gloire de Montpellier, Riparia Grand glabre, Riparia 

 Martineau. 



An examination of the different groups showed that the union of the Rupestris 

 with the Gamay was more intimate than Gamay with Riparia, and the difference in 

 size between scion and stock was scarcely noticeable, while between Riparia and 

 Gamay there was a marked difference in size. 



Considered from the standpoint of fruit production, the above grouping of varieties 

 might be just reversed. The Gamay on Rupestris grew luxuriantly but produced 

 little fruit, while on Riparia the growth was much less and the fruit production 

 much greater. In order to increase the fruitfulness of Gamay on Rupestris, the 

 branches were pruned to long arms. On an average 4 arms 50 to 60 cm. long were 

 left on each stock, and these were trained recurved in the form of a circle. As a 

 result the first 3 groups on Rupestris, as noted above, produced from 3 to 4 times as 

 much fruit as the fourth and fifth group on Riparia stock, the second group giving 

 the best returns. The experiment is believed to show that in pruning French vines 

 grafted on American stock the arms and number of buds left on each should be pro- 

 portional to the vigor of the vine. In soils where the Riparia grows fairly well, but 

 Rupestris develops much more vigorously, it is advisable to grow the latter and 

 prune properlj^ rather than the former. 



On the adaptation and affinity of Riparia, L. Rougier {Prog. Agr. et Vit. {Ed. 

 L'Est), 22 {1901), No. 35, pp. 266-269) .—The earlier work of the author (E. S. R., 

 13, p. 649) has shown that grafting French varieties on American stocks diminishes 

 the vigor of the latter, i:)articularly Riparia stocks as compared with Rupestris. 

 This result was reported with the Gamay variety used as scion. Further work in 

 the same vineyard with Syrah and Pinot varieties show like behavior on the Ameri- 

 can stocks. In order to overcome as much as possible the lack of affinity between 

 Gamay and Riparia, it is urged that the Riparia be planted on soiis neither too 

 moist nor too claj'ey, but that when this stock is used with Gamay it be i^lanted in 

 rich, deep, permeable soil, which does not suffer from either drought or an excess of 

 moisture. 



Success in grafting green vines in Roumania, A. S.xuget {Prog. Agr. et Vit. 

 {Ed. L'Est), 22 {1901), No. 27, pj). 12-14.) — In the reconstruction of some vineyards 

 in Roumania, the tongue graft or a modified form of the same has been employed 

 successfully with green wood. According to the author, in grafting the green vines, 

 the stock should not be less than 6 mm. in diameter where the graft is made, and the 

 wood should be hard enough so that it can not be easily com^jressed between the 

 thumb and finger. The scion should also have reached the same stage of maturity. 

 All the precautions necessary to the successful grafting of the dry wood cuttings must 

 be observed in grafting the green vines. The grafts once made and the scion and 

 stock firmly united by growth, they may be handled like cuttings, or roots may be 

 started on the stock below the graft by layering. The advantages claimed for the 

 green grafting of \anes are noted as follows: It simplifies operations by doing away 

 with the necessity of stratifying both scions and stocks; the chance element of suc- 

 cess in the nursery is reduced to a minimum; it is cheaper and a larger i^ercentage of 

 grafts succeeds; and it is believed that the system will permit of grafting, with more 

 chance of success, varieties which are difficult to unite when grafted dry. An 

 instance is cited in which 325 grafts of different varieties were made; all of these 

 grafts succeeded, 319 being first-class grafts, and only 6 defective. 



