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Title 

Screening, isolation and evaluation of a nematicidal compound from actinomycetes against the pine wood nematode, Bursaphelenchus xylophilus

Authors 

M J LiuByung Soon HwangC Z JinW J LiDong Jin ParkS T SeoChang-Jin Kim

Publisher 

Wiley

Issue Date 

2019

Citation 

Pest Management Science

Keywords 

pine wilt diseaseBursaphelenchus xylophilusactinobacteriaStreptomyces sp. AN091965spectinabilin

Abstract 

BACKGROUND: Bursaphelenchus xylophilus is a migratory endoparasitic nematode known to cause severe environmental damage and economic losses in pine forest ecosystems. This present study investigated the nematicidal metabolites of actinomycetes in vitro and evaluated the disease control efficacy of the active compound and metabolites under greenhouse and field conditions. RESULTS: Five thousand types of actinobacteria from Korean forest soil samples were screened to identify novel nematicidal agents against the pine wood nematode. Streptomyces sp. AN091965 showed the strongest nematicidal activity. One active compound, spectinabilin, was obtained by nematicidal asssy-directed fractionation, and it showed significant nematicidal activity against B. xylophilus, with an LC50 value of 0.84 ??gmL?1. Spectinabilin effectively suppressed the development of pine wilt disease in 5-year-old Pinus densiflora trees, even at 0.9 mg per tree under greenhouse conditions. Moreover, the acetone extract of the active strain’smycelia efficiently suppressed the development of pine wilt disease under field conditions. CONCLUSION: To the best of our knowledge, this the first report to describe the nematicidal activity of spectinabilin against B. xylophilus. The cell extracts described herein merit further field studies as potential nematicides against the pine wood nematode.

URI 

https://doi.org/10.1002/ps.5272

ISSN 

1526-498X

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-07-10


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