ROOT KNOT NEMATODE INFESTATION 65 



Stizolobium aterrimum, Bengal or Mauritius velvetbean. (C) 



Collins 1930 (42): Black Mauritius only very slightly subject to attack. 



Hawaii. 

 Godfrey 1928 (93) : Very slight infestation found on Mauritius velvetbean, 



on only 2 out of 50 plants examined; "can be safely considered as im- 

 mune." Hawaii. 

 Lyon 1911 (144)'- Has not in the least suffered from nematode attacks. 



Hawaii. 

 Smee 1928 (214) '■ Attacked in Nyasaland; should not be used for a starvation 



rotation. ["Indigenous velvetbean." Specific name, as above, given 



by Smee with a question mark.] 

 Stizolobium cochinchinensis (Mucuna lyoni; S. niveum), Chinese velvetbean, Lyon 

 velvetbean. 



Bessey 1911 (16): Grown in infested land without the slightest infestation. 

 Lyon 1911 (144)' Has not in the least suffered from nematode attacks. 



Hawaii. 



Stizolobium deeringianum, Deering velvetbean [erroneously called Mucuna 



utilis in the United States until 1909, when it was described as a distinct species]. 



Bessey 1911 (16): Grown in infested land without the slightest infestation. 



McClintock 1922 (145)'- All climbing and Bunch varieties were resistant in 



field tests. Georgia. 



1927 (148): The most exempt plant. Tennessee. 



Malloch 1923 (154): Field infestation found. California (Fresno County). 

 North Carolina Agricultural Experiment Station 1934 (181): Found 



highly resistant under a variety of conditions. 

 Shaw 1940 (218a): Tobacco in enclosure units showed less than 10 percent 



severe infestation following velvetbean or other highly resistant crops 



and 100 percent following tobacco or other susceptible crops. [North 



Carolina.] 

 Taubenhaus and Ezekiel 1933 (226): Infested occasionally; little loss. 



Texas. 

 Watson and Goff 1937 (258): Velvetbean has generally been "absolutely 



immune"; only one infestation has been found in Florida. 



Var. Alabama [Early Speckled or Hundred-Day; these names used also for Var. 

 Georgia]. 



Collins 1930 (42) : More nematodes on Early Speckled and on Hundred- 

 Day than on Black Mauritius. Hawaii. 

 Godfrey 1928 (93) : Hundred-Day definitely somewhat susceptible. Hawaii. 



Var. Bush [or Bunch; a sport from Var. Florida]. 



Arizona Agricultural Experiment Station 1936 (3): More resistant 



than the Iron or Brabham cowpeas tested. 

 Georgia Coastal Plain Experiment Station 1936 (88) : Infestation on 



tobacco averaged 12 percent to 15 percent after velvetbeans compared 



with 2 percent to 45 percent after other rotations. [Var. Bunch was 



named in the 1927 report (78).] 

 McClintock 1922 (145) : All Bunch varieties were resistant in field tests. 



Georgia. 

 Smee 1928 (214)' Rotation with Bunch velvetbeans has given good results 



in Nyasaland. 

 Watson and Goff 1937 (258) : "Absolutely immune." Florida. 



Var. Florida. 33 



Godfrey 1928 (98) : Almost completely free. Hawaii. 



Lyon 191 1 (144) ' Has not in the least suffered from nematode attacks 

 Hawaii. 



Orton 1903 (187) : Velvetbeans recommended for starvation rotation. 



Rolfs 1907 (201): Velvetbeans "almost quite immune." [In 1898 Rolfs 

 (200) made the following general statement, which has been cited as a 

 host record for velvetbean and for beggarweed: "Nearly every one is 

 familiar with the fact that plants belonging to the bean and pea family 

 are more or less subject to its attack. The cow-pea, velvet bean, and 

 beggar weed are our best nitrogen-gathering plants, and these at the 

 same time are often attacked . . . ; crab grass or possibly . . . beggar 

 weed" were suggested for rotation; "velvet bean or cow-pea had better 

 not be used."] 

 • ,3 The only velvetbean grown in the United States before 1906. 

 286871°— 41 5 



