ROOT KNOT NEMATODE INFESTATION 69 



Tung, see Aleurites. 



Turnip, see Brassica. 



Ty-ess, see Lucuma. 



Urochloa trichopus (name supplied), gonya grass. (C) 



Collins 1938 {it): Gonya grass not attacked (1 season). Rhodesia. 

 Vasey grass, see Paspalum. 

 Velvetbean, see Stizolobium. 

 Verbena bonariensis. (M) 



Godfrey 1935: 10 Infestation commonly observed to be light. Hawaii. 

 Verbesina virginica (V. sinuata), "crownbeard." 



Bessey 1911 (16): Nematodes not abundant and no injury observed. 



Neal 1889 (176): Badly "affected." Florida. 



Vernonia leptolepis. 



Collins 1937 (41) : No signs of nematode attack. Rhodesia. 

 Veronica peregrina, speedwell. 



Bessey 1911 (16): Nematodes not abundant and no injury observed. 

 Veronica tournefortii, speedwell. 



Bessey 1911 (16) : Nematodes not abundant and no injury observed. 

 Vetch, see Vicia. 

 Vicia atropurpurea, purple vetch. (M) 



Bessey 1911 (16): Nematodes not abundant and no injury observed. 

 Vicia fulgens, scarlet vetch. 



Bessey 1911 (16): Nematodes not abundant and no injury observed. 

 Vicia pseudocracca. 



Bessey 1911 (16): Nematodes not abundant and no injury observed. 

 Vicia spp., vetch. (N) 



Frank 1885 (68): No infestation found; other hosts preferred (one planting). 

 Germany. 



King and Hope 1934 (127): Used with onions and sesbania in a profitable 

 2-year rotation. Arizona. 



V. sativa, common vetch, and other species are sometimes reported heavily 

 infested. 



Vigna cylindrica (Dolichos catjang), catjang-pea. (S) 



Collins 1938 (41) : Highly susceptible; suggested for a trap crop. Rhodesia. 

 Kendrick 1929 (121): "No evidence of disease" (wilt and root knot; 1 



season) . California. 

 Krishna Ayyar 1933 (132) : Infestation "mild" in pot experiment. India. 

 Mackie, W. W. (California station; in letter, 1939): All varieties tested in 



badly infested soils died. 



Atkinson (4) and Neal (176) reported severe injury to "Dolichos catjang, cow- 

 pea." [Question: What plant was meant? Possibly common cowpea, below?] 



Vigna lutea. 



Mackie, W. W. (California station; in letter, 1939): Completely free from 

 root knot and other diseases and insects (tested 5 years). 



Vigna sinensis (V. unguiculata) , common cowpea. (N, S) 



Georgia Coastal Plain Experiment Station 1935 (79): No variety is 



entirely immune. 

 Watson 1924 (254): No cowpea is so resistant as velvetbean. Florida. 



Goff, and Bratley 1938 (259): A cowpea of Australian origin, seems 



very resistant; large vine, very long season. Florida. 



« See footnote 10, p. 11. 



