184 AMERICAN VINES. 



Herbemont. Finally, let us note that the Blue Favourite 

 has the same properties of adaptation as the Jacquez, and is 

 more vigorous but less resistant to phylloxera. 



Hybrids of V. Vinifera and V. Cordifolia. The V. 



Cordifolia has very great vigour and attains considerable 

 dimensions. This quality reappears in its hybrids with Vini- 

 fera, which are very strong and vigorous plants, possessing a 

 powerful root system. If resistant to phylloxera, they would 

 constitute graft-bearers of great value for all non-calcareous 

 soils. They become very yellow in chalky or calcareous 

 soils, and are of no value in such. Their cuttings root freely, 

 and their grafts knit well. They might, therefore, be mul- 

 tiplied in compact, clayey, or damp soils, as also in dry, poor, 

 but non-calcareous soils. 



Hybrids of V. Vinifera and V. Berlandieri. These 

 hybrids have all been obtained in France. These vines 

 offered, a priori, the greatest interest for the reconstitute on 

 of -vineyards in calcareous soils. Their progenitors are, as a 

 matter of fact, the two species of vines which thrive best in 

 such soils. We may recall the development which Folle- 

 Blanche, Pinot, Colombeau, etc., all vigorous varieties of 

 V. Vinifera, attain in the chalky and very calcareous soils of 

 being too weak, or on account of the variety of V. Ber- 

 landieri, as already stated, is the American species which 

 thrives best in soils of this nature. Non-grafted, its finest 

 varieties are as resistant to chlorosis as Folle-Blanche. Its 

 hybrids, therefore, must possess a high resistance to chlor- 

 osis, and the numerous experiments conducted by the writers 

 prove this in an incontestable manner. 



All the hybrids of this group cultivated in the Charentes 

 have always remained green when non-grafted, even greener 

 than Folle-Blanche planted side by side with them. Several 

 grafted with Folle-Blanche have never shown a trace of 

 chlorosis, even in the second year, which, as we have shown, 

 is the time when the disease reaches its greatest intensity. 

 Others, on the contrary, have become yellow on account of 

 t>eing too weak, or ion account of the variety of V. Ber- 

 landieri intervening in the crossing being itself too weak, or 

 incapable of thriving in calcareous soils. We should always 

 choose the most vigorous of these hybrids, as applies to all 

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