ROOT KNOT NEMATODE INFESTATION 43 



Neal 1889 (176): "Badly affected." Florida. 



Watkins 1929 (248): Alyssum rated as "resistant." Florida. 



Loganberry, see Rubus. 



Lolium perenne, perennial ryegrass. (C) 



Bessey 1911 (16): No infestation found. 



Whittle and Drain 1935 (263): Ryegrass listed as highly resistant. 

 Tennessee (?). 



Lonicera japonica, Japanese honeysuckle. (C) 



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

 Florida State Plant Board 1919 (66): Three infested shipments of 

 honeysuckle intercepted (from Ohio). 



The Mississippi station has a record of infestation on plants from Ohio. 



Lonicera nitida. 



Gardner 1926 (75): Observed to be a host. California. 

 Loquat, see Eriobotrya. 

 Lucerne, see Medicago. 

 Lucuma nervosa (L. rivicoa angustifolia) , canistel, ty-ess\ (C) 



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



Lupinus angustifolius. (M) 



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



Lupinus hartwegii, Hartweg lupine. 



Lyon 1911 (144)'- Seemed to be entirely free (one test). Hawaii. 



Lupinus spp. (N, S) 



Frank 1885 (68): No infestation found; other hosts preferred (one plant- 

 ing) . Germany. 

 Goff 1936 (96): Infestation found on only 1 plant, very light (annual 



ornamental; 15 plants, 1 winter test). Florida. 

 Zimmermann 1903 (269): Galls numerous, plants very unhealthy. Tangan- 

 yika (German East Africa). 



Lycopersicon esculentum, tomato. (N, S) 



Fajardo and Palo 1933 (60): 49 varieties were grown 35 days from seed, 

 in greenhouse pots; the highly susceptible varieties showed only 9 to 26 

 galls per plant. Seedlings of the following made good growth, although 

 all plants showed some galls: Vars. June Pink, Penn State Earliana, 

 and the Philippine native varieties "San Isidro No. 1," "Wild Cherry 

 (Lemery)," and "Pasig No. 1." Vars. Columbia and (Livingston) 

 Globe were rated as "resistant" in 1 test in spite of poor growth, 

 presumably because of rather low gall counts; other lots of these same 

 varieties were rated as susceptible. The small-fruited, wild types were 

 rated as "more resistant" than those with fleshy fruits, on the basis of 

 their very small galls. Varieties noted below appeared somewhat 

 "resistant." Philippine Islands. 



Ficht 1939 (63) : Field tests with Vars. Baltimore, Marglobe, Pride of Il- 

 linois, and Pritchard demonstrated considerable decrease in number of 

 fruits set on infested plants, in size of fruits and plants, and in yield of 

 fruits of each grade. Indiana. 



Li and Lei 1938 (138): 32 varieties tested in the experimental plots at 

 Lingnan University, China; all plants were infested except a few 

 individual plants of the varieties noted below. 



Young 1939 (266) : Root knot infestation caused a decrease of 8 percent in_ 

 the wilt resistance of Var. Early Baltimore, 23 percent in (Livingston) 

 Globe, 20 percent in Marglobe (4 selections), and from to 39 per- 

 cent in 45 other selections; the different percentages were probably 

 caused by differences in the severity of root knot. Only 3 of the 54 

 selections tested gave opposite results, and these were wilt-susceptible 

 varieties. Texas. 



