Resistance of Cucumis spp. to the Root-knot Nematode, Meloidogyne incognita acrita
Fassuliotis, G.
Journal of Nematology 2(2): 174-178
1970
ISSN/ISBN: 0022-300X PMID: 19322292 Document Number: 19013
The nature of resistance in Cucumis ficifolius and C. metuliferus to Meloidogyne incognita acrita was studied under glasshouse conditions. Although as many larvae penetrated the roots of these species as those of the susceptible C. melo, few developed to the adult female stage. Resistance in C. ficifolius and C. metuliferus was associated with hindrance of larval development beyond the 2nd-stage, delayed development of larvae to adults and stimulation toward maleness. Tissue necrosis or hypersensitivity was not associated with larval penetration. Comparisons of the histopathology of 26-day-old infections of C. melo and C. metuliferus roots showed no observable differences in the type of giant cell development in regions of roots associated with adult females. However, in C. metuliferus, immature nematodes were associated with small giant cells which were limited to a few cells near the head of the nematode. indicates author's summary.