Evaluation of Nematicidal Activity of Streptomyces yatensis KRA-28 against Meloidogyne incognita

Eun Jae Park, Hyun Jae Jang, Chan Sun Park, Seung Jae Lee, Soyoung Lee, Kang Hoon Kim, Bong Sik Yun, Seung Woong Lee, Mun Chual Rho

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The root-knot nematode (Meloidogyne incognita) is an important pathogen in crop cultivation, however, few methods are available to control this parasitic roundworm. In this study, the nematicidal effects of approximately 30 Streptomyces strains isolated from soil samples of Mt. Naejang (Korea) were tested against Meloidogyne incognita, and the culture broth of the strains KRA-24 and KRA-28 exhibited approximately 75% and 85% insecticidal activity, respectively, in in vitro assays. In in vivo pot experiments, these strains reduced the number of nematodes in the soil and the number of egg masses in the roots of red peppers. The two strains also survived in the presence of insecticidal agents (0.1 to 3.0%) such as fosthiazate, ethoprophos and terbufos when they were used in parallel. The mixture of KRA-24 or KRA-28 culture broth and fosthiazate exhibited nematicidal effects that were similar to those observed when KRA-24 or KRA-28 were used alone. Our results clearly suggest that the Streptomyces strains KRA-24 and KRA-28 should be promoted as a biocontrol agent against Meloidogyne incognita.

Original languageEnglish
Pages (from-to)700-707
Number of pages8
JournalJournal of Microbiology and Biotechnology
Volume30
Issue number5
DOIs
StatePublished - 28 May 2020

Keywords

  • Biocontrol
  • Meloidogyne incognita
  • Nematicidal activity
  • Streptomyces misionensis KRA-24
  • Streptomyces yatensis KRA-28

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