Screening of actinomycetes with antinematodal properties

Abstract

The effect of the metabolites of actinomycetes on the motility of the root-knot nematode, Meloidogyne incognita, was investigated. A thousand strains of actinomycetes were obtained from about 500 soil samples, and the suppressive effect of the acetone extract of each culture on the motility of the second-stage juveniles of M. incognita was examined. We found that the motility was suppressed by the extracts of six isolates, NA-128, -150, -303, -359, -369 and NA494. From the taxonomic characteristics, all six isolates were Streptomyces. In this report, we describe a method to screen for actinomycetes which suppress the motility of root-knot nematode and the taxonomy of six actinomycetes isolates (Streptomyces species) screened.