Reaction of two summer vegetables (Okra and Chillies) germplasm against root knot nematode (Meloidogyne incognita)

Abstract

The present study was done to determine the response of okra and chillies germplasm against root knot nematode (Meloidogyne incognita) in the green house at 34 ± 4 C. Five seeds of ten okra Varieties/lines (Subzpari, Super star, OH-152, Iqra 24, Iqra 1, China red, Diksha, M.S. 04, Sanam and Iqra 2) were sown in earthen pot and four week old chillies seedling of thirteen Varieties/lines (Tatapuri, C19, C33, C68, C73, C92, C103, C302, C2010-3, C2010-4, C2010-5, C2010-6 and C2010-7) were transplanted in pots. Okra and chillies plants were inoculated with 2000 second stage juveniles J₂ by making holes in root zone with a sharp wooden stick and covered the hole with sterilized soil to avoid the vaporization. The experiment was arranged in completely randomized design with ten replications. After 8 weeks of inoculation, the plants were harvested to determine the M. incognita reproduction on okra and chillies host plants. Twenty-three lines/verities of okra and chillies exhibited some variability in their response against RKN infection. Five lines/verities (C73, C 103, Sabz pari, lqra 24 & China red) were found susceptible whereas the seven varieties i.e. Super star, OH-152, Iqra 1, Iqra 2, Diksha, M.S 04 and Sanam were found highly susceptible. Five lines (C33, C68, C92, C302 and C2010-4) were observed moderate susceptible and five V/L (C2010-3, C2010-5, 02010­6, C2010-7 and Tatapuri) were found moderate resistant and while C19 was immune against M. incognita.