Resistance of Tomato, Bean, Southern Pea, and Garden Pea Cultivars to Root-Knot Nematodes Based on Host Suitability

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Abstract
Tomato, common bean, lima bean [Phaseolus limensis], southern pea and garden pea were evaluated for resistance to species and races of root-knot nematodes (Meloidogyne spp.). Many of the tomato cultivars tested were highly or very resistant to certain species and races, but none was immune. All tomato cultivars were susceptible to M. hapla. Resistance of "Anahu'', ''Atkinson'', Healani, ''Nemared'', ''Patriot'', ''Rossol'' and ''VFN-8'' to M. incognita and M. javanica was confirmed. ''Beef Master'', ''Manalucie'', ''Marmande'', Money Maker'', ''Ponderosa'' and ''Roma''.sbd.previously reported to be resistant.sbd.were susceptible. Tomato cultivars ''Better Boy'', ''662 VFN'', ''Monte Carlo'', ''Marmar'', ''Royal Chico'', and ''Rutgers'' ranged in susceptibility from highly resistant to susceptible based on egg mass indices. They were studied to determine final population, index of reproduction, and egg mass indexes. M. incognita race 4 was more aggressive than races 1, 2, and 3 when Oostenbrink''s reproductive factor was used. Penetration of M. incognita race 1 into tomato roots increased with increasing degree of susceptibility. Bean and southern pea differed in susceptibility to species and races of Meloidogyne. M. incognita race 4 was least aggressive on bean and lima bean. Southern pea varied in resistance to races 1, 2, and 3 of M. incognita. All cultivars of southern pea were either highly or very resistant to race 4.

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