Self interaction of the root-knot nematode, Meloidogyne incognita on tomato

A. Ahmad, S. A. Tiyadi, M. M. Alam


Most studies on the effect of a pathogen on a plant host have been made with single inoculations, although usually with several inoculum levels. In nature, however, plants are subject to invasion (infestation) by pathogens on several occasions during their period of growth, and this is certainly so with root-knot nematodes. Moreover, the effect of the secondary infestation is likely to be modified by the first. Jatala and Jensen (1976) investigated self interaction of Meloidogyne hapla and Heterodera schachtii on Beta vulgaris and concluded that neither pathogen produced any form of immunity in the host which would interfere with the secondary infestations. We have studied the effect of repeated inoculations of Meloidogyne incognita (Kofoid et White) Chitw. on the growth of tomato and the development of the nematode populations.

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