10 



Characteristics of Anaheim Characteristics Shown by Dying Vines 



Disease. in Santa Clara Valley. 



Mission more susceptible than Mataro 

 or Zinfandel. 



'Page 

 141 



Mataro and Zinfandel have died more 

 generally than the Mission. 



Vines in shade of trees less rapidly i j Vines near trees have suffered as much 



affected. 108 | or more than others. 



j ! 



Grafting the vines does not save them. ! 138 ! All the recently grafted vineyards are 



healthy. 



Cuttings from affected vines which | I There are many instances in which cut- 



show the disease die as soon as the j tings taken during the last two, three, 



parent vines. I 152 i and four years from Mataro and Mis- 



sion vines which are now dead have 

 been planted, or grafted on phyllox- 

 era-resistant stock, and have now 

 resulted in vigorous, healthy vines. 



Rotting of the roots is a constant | 

 symptom. 52 



Roots of most of the injured vines are 

 sound. 



*The numbers refer to pages in the above-mentioned bulletin. 



To these contrasts should be added the apparent recovery of Grenache 

 vines, which were badly affected last year and this spring, but which in 

 August were making a vigorous healthy growth. Though Mr. Pierce 

 may not make the statement definitely, the impression left, on reading 

 his publications on the Anaheim disease, is that it is cumulative and 

 progressive and that the attacked vines never recover. 



These contrasts prove either that the Anaheim disease is not the 

 cause of the death of the Santa Clara vines, or that the characteri- 

 zation of the disease as given in the publication above referred to must 

 be profoundly modified to include the symptoms exhibited by these 

 vines. There is, however, no reason at present to suggest the Anaheim 

 disease if, as seems at least very probable, the causes here outlined are 

 sufficient to account for the observed effects. 



Practical Lessons. This serious disaster contains two important prac- 

 tical lessons to horticulturists, and especially to vineyardists: First, 

 the necessity of having on hand the means for supplementing a deficient 

 rainfall, even in what are usually considered the non-irrigating districts; 

 and second, the importance of choosing varieties adapted to special 

 locations, soils, and climates. This question of adaptation is particu- 

 larly important to grape-growers who are planting phylloxera-resistant 

 stock, as all the good and thoroughly resistant vines are comparatively 

 limited in their range of adaptability. Wherever new vines are planted 

 in the devastated area it would be extremely unwise to plant any 

 variety which has not well-proved drought-resisting qualities. The 

 resistant vines which have shown the best results so far on the west side 

 of the Santa Clara Valley are Rupestris St. George, Rupestris Martin, 

 and Champini. The last has thriven almost or quite as well as the two 



