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KMID : 0545120070170060968
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Journal of Microbiology and Biotechnology
2007 Volume.17 No. 6 p.968 ~ p.978
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Identification of Two Entomopathogenic Bacteria from a Nematode Pathogenic to the Oriental Beetle, Blitopertha orientalis
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Yi Young-Keun
Park Hae-Woong
SHRESTHA SONY
Seo Ji-Ae
Kim Yeung-Wook
Shin Chul-Soo
Kim Yong-Gyun
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Abstract
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A pathogenic nematode, Butlerius sp., was isolated from Oriental beetle, Blitopertha orientalis. The infective juveniles exhibited dose- as well as time-dependent entomopathogenicity on the larvae of B. orientalis. Two bacterial species, Providencia vermicola (KACC 91278) and Flavobacterium sp. (KACC 91279), were isolated from the infective juveniles and identified. P. vermicola outnumbered Flavobacterium sp. in the nematode host, in which the colony density of P. vermicola was found to be 21 times higher than that of Flavobacterium sp. However, when the two bacterial species were cocultured in culture media without the nematode host, they showed similar growth rates. Both bacteria induced significant entomopathogenicity against Spodoptera exigua larvae infesting economically important vegetable crops, where P. vermicola was more potent than Flavobacterium sp.
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KEYWORD
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Entomopathogenicity, Providencia vermicola, Flavobacterium, Butlerius, ITS, 16S rDNA
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