74 MISC. PUBLICATION 40 6, U. S. DEPT. OF AGRICULTURE 



Vitis linsecomii, pinewoods grape. 

 Var. Neosho. 



Snyder 1936 {216): Infestation slight, rating 25 (10 vines, 1 year). 



Vitis longii (V. solonis), Longs grape. 



Var. Australis. 



Snyder 1936 {216): Infestation slight, rating 25 (63 vines, 4 years). 



Vitis riparia, see V. vulpina. 



Vitis rupestris, sand grape. 



Lavergne 1901 {186): Xo galls nor root degeneration, several years in in- 

 fested vineyard. Chile. 

 Manuel 1924 {156): Var. Du Lot "has been mentioned as immune." 

 Snyder 1936 {216) : Infestation very severe, rating 85, on Vars. "des Semis 

 No. 81-2" and "Pillans." 



Var. St. George. 



Bessey 1911 {16): Resistant; showed no root knot (tested by a nurseryman 



in California). 

 Snyder 1936 {216): Infestation very severe, ratings 75 and 80. 



Vitis vinifera, European grape. (N, S) 



Var. Sultanina (Thompson seedless). 



Bessey 1911 {16): Apparently not so easily injured as other varieties of V. 



vinifera. 

 Brown 1931: M Infestation abundant on a vine in Arizona, which produced a 



crop 3 years previously but none since. 

 Milbrath 1923 {162): Illustration of severely infested root. California. 

 Nougaret 1923 (1.82)-. "Infestation severe, though less than on several other 



varieties of V. vinifera; rating 50. 

 Snyder 1936 {216): Infestation very heavy, roots badly rotted; illustration. 



Vitis vulpina (V. riparia), riverbank grape. 



Huergo 1903 (112) : Infestation found only on young rootlets; said to cause 

 less decay than on other grape roots. Argentina. 



Lavergne 1901 (186) : No galls nor root degeneration, several years in in- 

 fested vineyard. Chile. 



Neal 1889 (176): Certain races, for rootstocks, are free from the disease. 

 Florida. 



Snyder 1936 (216): Infestation medium on Var. Gloire ("Riparia Gloire"); 

 rating 55 (49 vines, 4 years). 



Vitis spp., and hybrids. (N) 



Bessey 1911 (16): "Some of the phylloxera-resistant hybrids and pure 



American sorts are practically immune" but some "quite badly affected." 

 Whittle and Drain 1935 (268) : 'No nematodes found On the common eastern 



bunch varieties at Knoxville, Tenn. 



Var. Muench [V. aestivalis bourquinianaXV. linsecomii]. 



Snyder 1936 (216): Infestation slight, rating 25 (11 vines, 1 year). 



No. 101-14: V. vulpinaXV. rupestris. 



Manuel 1924 (156): Seen "affected." New South Wales. 



Nougaret 1923 (182): Galls, very small, found on 7 percent of the plants; 



rating 5 (50 cuttings, 1 year). 

 Snyder 1936 (216): Infestation medium, rating 45 (56 vines, 4 years). 



No. 106-8: V. vulpinaX(V. cordifoliaXV. rupestris). 



Nougaret 1923 (182) : Infestation found on 4 percent of the plants; rating 5 



(50 cuttings, 1 vear). 

 Snyder 1936 (216) : Infestation "mild," rating 30 (78 vines, 4 years). 



No. 108-16: V. rupestris X V. vulpina (V. riparia). 



Snyder 1936 (216): Infestation slight, rating 20 (30 vines, 4 years). 



No. 120 A: V. vulpina X V. rupestris. 



Nougaret 1923 (182): Galls, very small, found on 25 percent of the plants; 

 rating 5 (100 cuttings, 1 year). 



" Brown, J. G. root knot in Arizona. U. S. But. Plant Indus., Plant Dis. Rptr. 15: 148. 1931. 

 [Mimeographed.] 



