Studies on the inteaction of meloidogyne javanica ralstonia solanacearum and xanthomonas campestris pv Vesicatoria on tomato

Abstract

Five hundred root and soil samples were collected from tomato fields of newlineAligarh district These samples were examined for the presence of root knot nematode newlineMeloidogyne spp pathogenic bacteria Ralstonia solanacearum and Xanthomonas newlinecampestris pv vesicatoria Out of these samples root knot nematode Meloidogyne newlinespp were found in 402 samples with 80 4 frequency of occurrence while R newlinesolanacearum and X campestris pv vesicatoria were isolated from 329 and 245 newlinesamples with 65 8 and 49 0 frequency of occurrence respectively Out of 402 newlinesamples infected with Meloidogyne spp in 61 samples Meloidogyne spp was newlinepresent alone while in 130 samples it was present concomitantly with R newlinesolanacearum However Meloidogyne spp was found together with X campestris newlinepv vesicatoria in 47 samples while 14 samples were found concomitantly infected newlinewith R solanacearum and X campestris pv vesicatoria Moreover R solanacearum newlineand X campestris pv vesicatoria were found alone in 21 and 20 samples respectively newlinewhile in 164 samples all three pathogens i e Meloidogyne spp R solanacearum and newlineX campestris pv vesicatoria were present concomitantly Out of total 402 samples newlineM javanica was present in 199 M incognita in 179 and M arenaria in 24 samples newlineSeveral samples revealed mixed infection of Meloidogyne spp newline