ROOT KNOT NEMATODE INFESTATION 57 



Primus insititia, damson plum. 



Tufts and Day 1934 (234): No visible infestation in nursery on rooted 

 cuttings of Vars. Damson (reported as "Black Damas C"— meaning 

 Black Damascene (?)— tested 2 seasons), St. Julien E (1 season), nor St. 

 Julien G (2 seasons), but infestation very heavy on St. Julien 3-P. 

 California. 



Prunus mume, Japanese apricot. 



Hutchins 1937 (114)' Roots free in all Georgia tests (seeds from com- 

 mercial seedsmen in the United States in different years, and from the 

 University of Nanking, China). 



Tufts and Day 1934 (284)'- No infestation found on seedlings in nursery. 

 California. 



Prunus munsoniana, wildgoose plum. 



Neal 1889 (176): A valuable rootstock for susceptible scions. Florida. 

 Tufts and Day 1934 (234): No visible infestation on seedlings ("Improved 

 Wild Goose"; 1 season, 1934, in Delhi nursery). California. 



Prunus salicina (P. tri flora) , Japanese plum. 

 ' Neal 1889 (176): Vars. Kelsey, Ogon ("Ogru"), and Satsuma are " valuable" 

 rootstocks for susceptible scions; but even the native plums suffered 

 when peach died. Florida. 



Prunus virginiana, common chokecherry. 



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

 Prunus spp., plum. 



Bessey and Byars 1915 (17): Native wild plum is resistant. Florida. 

 Hume 1937: 13 Infestation not sufficiently serious on any plum to damage 



its growth. Florida. 

 Hutchins, L. M. (Division of Fruit and Vegetable Crops and Diseases, 



Bureau of Plant Industry. 1939): No infestation observed on any 



native plums in Georgia. 

 McClintock 1922 (145): No knots found on wild and cultivated plum 



seedlings (1 season). Georgia. 

 Taubenhaus and Ezekiel 1933 (226): Losses rarely serious. Texas. 

 Tufts and Day 1934 (234): In Vars. "Methley (P. cerasifera X P. salicina)" 



and Cheresoto (P. besseyi, Bessey cherry, "western sand-cherry" X P. 



americana, Var. Desoto) , classed as moderately or heavily infested, some 



seedlings were found free from knots (1 season, 1934). California. 

 Watson and Goff 1937 (258): Native plums resistant. Florida. 



Prunus, see also Amygdalus. 



Pseudarthria hookeri. (C) 



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

 Psidium guajava, guava. (C) 



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



Florida State Plant Board 1925 (66): Two infested shipments intercepted; 

 grown in Florida. 



Psophocarpus tetragonolobus, seguidilla. (C) 



Fajardo and Palo 1933 (60): Rated as "resistant" (judged by growth); 

 six plants infested, one free. Philippine Islands. 



Pueraria hirsuta (Dolichos japonica; P. thunbergiana) , kudzu-bean. (N) 



Boyd 1927: 14 Loss 1 percent for Georgia; 50 percent infestation in one field, 



developed apparently during the winter months. 

 Collins 1938 (41): Kudzu-vine listed among plants not attacked (1 season). 



Rhodesia. 

 Watson 1929 (255): Kudzu rated as No. 41 in order of susceptibility [from 



okra, No. 1, to peanut, No. 43]. Florida. 



13 See footnote 5, p. 8. 



u Archer, W. A. diseases of forage crops. U. S. Bur. Plant Indus., Plant Dis. Rptr. Sup. 53: 192- 

 38, illus. 1927. [Mimeographed.] See report of Boyd, p. 204. 



