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- W2015324265 abstract "Xenorhabdus 및 Photorhabdus 두 곤충병원세균은 곤충의 아이코사노이드 생합성을 억제하여 면역작용을 저하시키는 인자로 알려지고 있다. 본 연구는 이들 세균의 배양액을 이용하여 배추좀나방(Plutella xylostella)을 방제하는 새로운 생화학농약을 개발하려 추진되었다. 두 세균 배양액의 단독 처리는 배추좀나방의 생존력에 뚜렷한 영향을 주지 않았다. 그러나 비티(Bacillus thuringiensis) 생물농약과 혼합하여 처리할 경우 비티 단독 처리에 비해 배추좀나방 4령충에 대해서 현격하게 높은 병원성 증가효과를 주었다. 배양액의 세균 활성을 조사하기 위해 이 세균 배양액을 고온 멸균 및 <TEX>$0.2;{mu}m$</TEX> 여과 멸균 처리하였다. 이렇게 처리된 멸균 배양액은 세균이 생존했던 배양액과 차이 없이 비티 생물농약의 병원력을 상승시켰다. X. nematophila 배양액에서 유래된 세 가지 대사물질도 세균배양액과 유사한 비티 병원력 상승효과를 보였다. 야외 배추좀나방 방제 시험에서도 세균배양액은 비티 생물농약의 방제가를 상승시키는 효과를 나타냈다. Two groups of entomopathogenic bacteria, Xenorhabdus and Photorhabdus, are known to suppress insect immune responses by inhibiting eicosanoid biosynthesis. This study used these bacterial culture broths to develop novel biochemical insecticides against the diamondback moth, Plutella xylostella. Though the bacterial culture broths alone showed little insecticidal activity, they significantly enhanced pathogenicity of Bacillus thuringiensis against the fourth instar larvae of P. xylostella. Sterilization of the bacterial culture broth by autoclaving or <TEX>$0.2;{mu}m$</TEX> membrane filtering did not influence the synergistic effect on the pathogenicity of B. thuringiensis. Three metablites identified in the culture broth of X. nematophila also showed similar synergistic effects. In field test, both entomopathogenic bacterial culture broth also enhanced the control efficacy of B. thuringiensis against P. xylostella." @default.
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- W2015324265 date "2010-09-30" @default.
- W2015324265 modified "2023-10-14" @default.
- W2015324265 title "Study on Development of Novel Biopesticides Using Entomopathogenic Bacterial Culture Broth of Xenorhabdus and Photorhabdus" @default.
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- W2015324265 doi "https://doi.org/10.5656/ksae.2010.49.3.241" @default.
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