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A total of 82 Cucumis cultigens, Cucumis anguria, C. anguria var. longaculeatus, C. ficifolius, C. metuliferus, and C. sativus, were evaluated for their resistance to two species of root-knot nematodes, Meloidogyne arenaria race 2 and M. incognita race X. One accession of C. heptadactylus, two of C. anguria, two of C. anguria var. longaculeatus, nine of C. metuliferus were resistant to both species of root-knot nematodes. The accessions showed different degree of resistance to different species of root-knot nematodes; C. metuliferus PI 526242 was susceptible to M. arenaria (75% gall) but was resistant to M. incognita (10% gall). C. sativus resistant breeding lines, ´NC-42´, ´NC-43´, ´Lucia´, ´Manteo´, and ´Shelby´ from North Carolina State University were all susceptible (72∼90% gall) to Korean population of M. arenaria race 2. Identified resistant accessions can be used as a resistant source to develop root-knot nematode resistant cultivars or rootstocks.
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