ROOT KNOT NEMATODE INFESTATION Q3 



Sida rhombifolia. 



Barber 1901 (9): Weed host in south India. 



Bessey 1911 (16): Nematodes abundant, injury apparently not great. 

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

 Costa Neto 1937 (47): Weed host in Brazil. 



Sinapis, see Brassica. 



Smilax glauca, sawbrier. (C) 



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

 Smilo, see Sorghum. 

 Snapdragon, see Antirrhinum. 

 Soja max (Glycine hispida), soybean. (N, S) 



Mackie, W. W. (California station; in letter, 1939): The Laredo soybean 

 and many others, and soy hybrids from W. J. Morse, have shown high 

 resistance. 

 Var. Acme. 



Lyon 1911 (144)'- Relatively free from galls. Hawaii. 



Var. Biloxi. 



Barrons 1938: 31 Almost free from galls, even in artificially inoculated soil. 

 Alabama. 



Georgia Coastal Plain Experiment Station 1938 (85): Of only slight 

 value for control rotation. 



Godfrey 1928 (93): Root knot developed from month to month until prac- 

 tically all plants were "affected." Hawaii. 



McClintock 1922 (145) : Consid arable resistance, some in"ested plants found 

 (3-year tests). Georgia. 



Whittle and Drain 1935 (263): Listed as slightly infested. Tennessee (?). 

 Var. Haberlandt. 



Ernst 1924 (58): Resistant cover crop. [The source of this information has 

 not been found.] California (?). 

 Var. Laredo. 



Collins 1938 (41)'- Not attacked (1 season). Rhodesia. 



Fenne 1940 (61a): Found heavily infested just before cutting time, with some 

 roots an inch or more in diameter. Virginia (Caroline County). 



Georgia Coastal Plain Experiment Station 1938 (85): Of only slight 

 value for control rotation. 



Godfrey 1928 (93): Resistance held as compared with susceptible varieties. 

 Hawaii. 



McClintock 1922 (145): Considerable resistance; some infested plants found 

 (3-year tests) . Georgia. 



Mackie, W. W. (California station; in letter, 1939): Highly resistant. 



Morse 1927 (169): Thus far shews the greatest resistance. 



Piper and Morse 1923 (190): Laredo and three unnamed varieties showed 

 high resistance; tested in Florida, Georgia, and South Carolina. [The 

 unnamed varieties are no longer grown. Kornfeld (128) reported that 

 one variety called resistant by Piper and Morse was attacked in Rumania.] 



Shaw 1940 (213a): Tobacco in enclosure units showed less than 10 percent 

 severe infestation following bare fallow or certain highly resistant crops, 

 69.8 percent following Laredo soybeans, and 100 percent following 

 tobacco or other susceptible crops. [North Carolina.] 



Whittle and Drain 1935 (263): Listed as highly resistant. Tennessee (?). 



Var. Otootan. 



Georgia Coastal Plain Experiment Station 1936 (83): Moderately sus- 

 ceptible, not adequate for control rotation. 

 Godfrey 1928 (93): Growth vigorous; root knot developed from month 



to month until practically all plants were "affected." Hawaii. 

 McClintock 1922 (145): Considerable resistance, some infested plants found 

 (3-year tests) . Georgia. 

 Solanum tuberosum, potato. (N, S) 



Frank 1885 (68): Infestation conspicuously absent; other hosts preferred 

 (one planting). Germany. [Listed as a host plant by Frank in 1896 

 (69).} 

 Watson and Goff 1937 (258): Grows well, but infested tubers are unsalable 



and do not keep well. Florida. 



11 See footnote 70, p. 44. 



