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KMID : 0545120200300050700
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Journal of Microbiology and Biotechnology
2020 Volume.30 No. 5 p.700 ~ p.707
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Evaluation of Nematicidal Activity of Streptomyces yatensis KRA-28 against Meloidogyne incognita
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Park Eun-Jae
Jang Hyun-Jae
Park Chan-Sun
Lee Seung-Jae
Lee So-Young
Kim Kang-Hoon
Yun Bong-Sik
Lee Seung-Woong
Rho Mun-Chual
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Abstract
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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.
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KEYWORD
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Meloidogyne incognita, Streptomyces yatensis KRA-28, biocontrol, Nematicidal activity, Streptomyces misionensis KRA-24
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