Influence of Pseudomonas oryzihabitans on growth of tomato plants and development of root-knot nematode Meloidogyne javanica.

摘要

Root-knot nematodes (Meloidogyne spp.) constitute one of the major pests, causing significant economic loss to agricultural crops worldwide. Currently effective management depends on chemical treatments. Methods based on biological control are neededto reduce the threat of environmental damage. The bacterium Pseudomonas oryzihabitans, symbiotically associated with Steinernema abbasi, was shown to produce compounds with nematostatic effects in vivo. Roots of tomato plants were dipped in suspensions of P.oryzihabitans at different concentrations, which were later inoculated with nematodes. In treatments at 10~4 and 10~5 cells ml~(-1) plant growth was improved and nematode development delayed.