Variations were observed in resistance or susceptibility among eight aubergine cultivars to Meloidogyne javanica. Brinjal Jamak was the only cultivar found to be moderately resistant. Two cultivars namely Brinjal Shilpa and Singh Nath 666 appeared moderately susceptible. Five cultivars viz. Round Black, Short Purple, Brinjal PPL, Global Brinjal PPL and Namyal Ratchburi behaved as susceptible. All the cultivars behaved differently regarding formation of galls, egg masses, number of eggs per egg mass and reproductive factor. Maximum galls, egg masses, eggs per egg mass and reproductive factors were observed on Round Black followed by Global Brinjal PPL and the minimum were recorded on cultivar Brinjal Jamak. Similarly, significant effects of M. javanica were observed on growth parameters of these cultivars. The reductions in moderately resistant cultivar were significantly lower as compared to the moderately susceptible and susceptible cultivars. The maximum reductions in shoot and root lengths and shoot weight were recorded in case of Round Black followed by Global Brinjal PPL. On the other hand, the minimum reductions in these parameters were found in Brinjal Jamak. Similarly, the infection of M. javanica caused an increase in root weights of all the cultivars. The increase in root weight was the minimum in cultivar Brinjal Jamak while it was the maximum in case of Round Black followed by Global Brinjal PPL. Regression analysis showed positive and significant relationships between number of galls and reductions in shoot and root lengths and weights. As the plants of moderately resistant cultivar Brinjal Jamak suffered less damage and suppressed nematode infection considerably and therefore, recommended for cultivation in root-knot nematode infested fields to abate yield losses and repress the nematode from further multiplication.
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