24 MISC. PUBLICATION 4 6, U. S. DEPT. OF AGRICULTURE 



Lavergne 1901 (135, 136): "Anguillula vialae" was found after considerable 

 searching in decayed roots of orange and lemon; orange was much more 

 resistant to the citrus disease than was lemon; bitter orange seemed 

 absolutely free. Chile. [Lavergne's Anguillula vialae measured 2.0 

 to 2.5 mm., much larger than the root knot nematode; sketches show 

 stylet-bearing nematodes, annelids, and insect larvae, all labeled 

 "anguillule." There is no statement that galls were found on any 

 citrus roots. Some of the galls on grape were probably root knot, 

 others probably phylloxera galls, but grape was not affected by the 

 citrus disease.] 



Neal 1889 (176) : Bitter-sweet orange, lemon, and orange "slightly affected." 

 "The grape, fig, mulberry, and orange are prone to circular knob-like 

 knots on the sides of the larger roots, and an occasional enlargement 

 at the junction of small roots." The hardy bitter-sweet or sour species 

 nearly disease-proof and a vigorous grower; Citrus nobilis unshiu, 

 Satsuma orange, and also Poncirus trifoliata (Citrus trifohata), hardy 

 orange, seem resistant, "but the time of trial has been too short." 

 Florida. 



Watson and Goff 1937 (258): Citrus trees seem to be entirely free from 

 attack. Florida. 



Webber and Orton 1902 (260) : Roots of orange trees in all parts of Florida 

 were carefully examined; no trace of nematode injury found. 



Reports of infestation by the citrus-root nematode, Tylenchulus semi-pen etrans 

 Cobb, should not be mistaken as root knot. 



Clematis spp., clematis. (N, S) 



Bessey 1911 (16): Injury to C. paniculata severe. 



Chifflot 1900 (35) : Varieties of five species are named as most affected 

 by a severe disease that wilts the plants overnight, rapidly blackens the 

 collar and branches, and desiccates the plant. A few dead plants [the 

 kind not stated] were pulled up; the}- showed numerous small and large 

 galls. France. 



Lindinger (oral communication quoted by Wilke (264)) '• Roots of C. viticella, 

 Italian clematis, heavily knotted but without injury to the plants. 

 Germany (Bavaria). 



Milbr^th 1927 (163): Normal flower production is prevented. California. 



Muller 1884 (173): Plants badly diseased; finally killed. Germany. 



Ritzema Bos 1900 (199) : Plants in nurseries with favorable growth condi- 

 tions appear equally healthy whether or not the roots are covered with 

 galls. 



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



White 1930 (262): Listed among the ornamentals generally considered most 

 highly susceptible. 



Only these few references discuss the amount or severity of infestation; 20 

 species and numerous varieties have, however, been reported as hosts. According 

 to the experience of the Division of Xematology infestation is serious, in some cases 

 at least, on C. jackmann and other species. 



Cleome gynandra, small spider-flower. 



Godfrey 1935: 33 Infestation commonly observed to be light. Hawaii. 



Clover, Egyptian, see Trifolium; bur-clover, see Medicago; bushclover, Japanese- 

 clover, see Lespedeza; Mexican-clover, see Richardia; sweetclover, see 

 Melilotus. 



Coffea arabica, Arabian coffee. (N, S) 



Bessey 1911 (16): Injury severe. 



Frank 1885 (68): Galls fairly numerous in several inoculated pots; in two 

 pots the inoculum was apparently inadequate. Germany. 



Jobert 1878 (120) : Galls found on the feeding rootlets of trees that appeared 

 vigorous; black mycelium on the roots of dead trees. Brazil. [Al- 

 though the above are the only definite statements of facts concerning 

 the etiology of a disease that caused rapid and extensive destruction in 

 many plantations, the discussion in this paper seems to have started 

 the idea of the severny of root knot on C. arabica. This paper has been 

 cited as the original report of root knot on this species. Root knot is 

 unmistakablv described, but the kind of coffee is not named.] 



33 See footnote 10, p. 11. 



