SPRAYING THE VINES 



21 



the Tokay and Verdel are an easy prey to the disease, while on a 

 gravelly clay of medium quality the first named succumbs easily 

 and the other two vines are very hardy. In a somewhat rich, stiff 

 clay on my own place the Verdel is hardier than the Tokay, while 

 on a poor gravelly clay the latter is the hardiest. If there is so 

 much difference between varieties of the same species, it can easily 

 be seen, that a single resistant, that will do better than any other on 

 any kind of soil or in any locality, will never be found. It will al- 

 ways be necessary to employ different ones to get best results, es- 

 pecially in mountain districts where soils vary so much. 



Figure I as given below shows the range of adaptation of 

 different species and of the two hybrids Lenor and Champini, 

 ungrafted, in regard to moisture changes in the soil. Grafted to 

 Viniferas it would become less, excepting Riparia, which probably 

 has a less drouth-resistant foliage than the Viniferas, as it occurs 

 wild only in cool places in the shade of trees, but even this would 

 become somewhat weakened after grafting on account of lack of 

 sufficient affinity (similar to Rupestris) and the heavy bearing of 

 the Vinifera-top. 



FIG. i. 



Dry 



Slightly 



Moist 



Moist 



Extremely 

 Moist 



Wet 



c- 



Berlandieri 

 Candicans 

 Californic a 

 Riparia 

 Rupertris 

 Champini 

 Vinifera 

 Lenoir 

 Cordifolia 

 x.Cinerea 



Of course the lines in the diagram show the range of adapta- 

 tion only comparatively and approximately, as exactness would be 

 difficult. Not only the inherent adaptability of the stocks will have 

 to be considered, but also the form of root system, depth and nature 



