It has been described in the previous paper¹⁾, that 4 highly effective substances were discovered in the course of screening test for nematocidal substances produced by actinomycetes, and that some known antibiotics, such as blastmycin and antimycin A also have nematocidal activities.

In order to examine whether those nematocidal substances were also effective to plant parasitic nematodes, the tests using root-knot nematodes were undertaken in pot scale.