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



Coffea spp., coffee [species not stated by authors]. 



Bally and Reydon 1931 (8): Infested trees often seem to flourish. Java. 

 [The species most discussed in this paper are C. arabica and C. robusta, 

 but even the illustration of young plants with badly infested taproots 

 is labeled merely "coffee."] 



Baeber 1901 (9): No authentic case of infestation has been reported in 

 south India. 



Bondar 1915 (20): Found free in infested soil; instances of infestation have 

 been found, usually on tender young roots in damp, shaded land; inocu- 

 lation experiment negative (eight pots, 8 months). Brazil. 



Fawcett 1915 (61): Root knot (confirmed by Bessey (16, p. 75)) found at 

 the base of the trunk. "No real evidence that the trees are really 

 injured by this disease," possibly because of heavy soil. Puerto Rico. 



Soltwedel T889 (217): Infestation found in three different plantations in 

 central Java. 



Coffee roots are infested by a number of other nematodes, including Tylenchus 

 coffeae and T. acutoeaudatus of Zimmermann (268), either of which may cause 

 severe injuries; references to these "coffee nematodes" have been quoted in 

 bulletins on root knot. Symptoms that suggest fungus disease (cf. No well, 183) 

 were ascribed to root knot in much of the early literature. Papers that failed 

 to name the kind of coffee have been listed in compilations as referring to C 

 arabica —which is known to be heavily infested at times. Only a few of the 

 reports of injury to coffee are cited. 



Collards, see Brassica. 



Commelina nudiflora, creeping dayflower [called locally "Honohono-grass," 

 "wandering Jew"]. (C) 



Godfrey 1935: 34 Infestation commonly observed to be light. [In 1930 

 Godfrey (94) reported infestation frequent.] Hawaii. 



Unspecified wild plants of this genus have been found attacked in Florida 

 (258) and in Nyasaland (214). 



Coreopsis lanceolata, lance coreopsis. 



Goff 1936 (96): No infestation found (42 plants, 2 winter tests). Florida. 

 Coreopsis tinctoria, caliiopsis. 



Goff 1936 (96): No galls found on 52 plants, very light infestation on 16 

 plants (3 tests). Florida. 



Watkins 1929 (24-8): Caliiopsis rated as "resistant." Florida. 



Coreopsis sp., leptosyne. 



Goff 1936 (96): Infestation to heavy (16 plants, 1 winter test); average 

 rating "very lightly infested." Florida. 



Coreopsis, see also Bidens. 



Coriandrum sativum, coriander. (C) 



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



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

 India (Madras). 



Corn, see Zea. 

 Cornflower, see Centaurea. 



Cosmos bipinnatus, common cosmos. (C) 



Barrons 1939 (13): Numerous larvae entered root tips of seedlings (Var. 



Early White) heavily inoculated in greenhouse. Alabama. 

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

 Goff 1936 (96): Infestation very light, but moderate on 1 plant; many 



plants free, especiallv in winter (90 plants, 3 tests). Florida. 

 Watkins 1929 (248): Rated as "resistant." Florida. 



Infestation on cosmos has been reported also from California (75) and from 

 Rhodesia (41, 1938). 



3i See footnote 10, p. 11. 



