농업생명과학연구 (Journal of agriculture & life science)

  • 제45권6호
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  • Pages.115-124
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  • 2011
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  • 1598-5504(pISSN)
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  • 2383-8272(eISSN)
경상대학교 농업생명과학연구원 (Institute of Agriculture & Life Science, Gyeongsang National University)
권호 표지

자외선이 곤충병원성선충의 생존과 대체기주 누에에 대한 병원성에 미치는 영향

Effect of Ultraviolet Light on Survival and Pathogenicity of Entomopathogenic Nematodes against an Alternative Host Silk Worm, Bombyx mori

  • 이동운 (경북대학교 생태환경관광학부) ;
  • 김영섭 (경북대학교 생태환경관광학부) ;
  • 김판기 (경북대학교 생태환경시스템학부) ;
  • 추호렬 (경상대학교 응용생물학과(농업생명과학연구원))
  • Lee, Dong-Woon (School of Ecological Environment and Tourism, Kyungpook National Univ.) ;
  • Kim, Young-Sub (School of Ecological Environment and Tourism, Kyungpook National Univ.) ;
  • Kim, Pan-Gi (School of Ecology and Environmental System, Kyungpook National Univ.) ;
  • Choo, Ho-Yul (Dept. of Applied Biology, Gyeongsang National Univ.(Insti. of Agric. & Life Sci.))
  • 투고 : 2011.09.16
  • 심사 : 2011.12.20
  • 발행 : 2011.12.30
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구는 누에의 식엽성 곤충을 대체할 실험곤충으로서의 유용성과 자외선이 한국산 곤충병원성선충 (Heterorhabditis sp. 202 strain, Heterorhabditis sp. Gyeongsan strain, Steinernema sp. 223 strain, S. carpocapsae Pocheon strain, S. glaseri Dongrae strain, S. longicaudum Nonsan strain)의 병원성과 생존에 미치는 영향을 알아보기 위하여 수행하였다. 누에에 대한 곤충병원성선충의 병원성을 조사한 결과 누에의 령기나 곤충병원성선충의 계통이나 종에 따라 상이한 병원성을 나타내었는데 5령충에 대해서는 Steinernematidae선충의 병원성이 높았고, 1령충에 대해서는 Heterorhabditidae선충의 병원성이 높았다. UV-C는 곤충병원성선충에 유해하여 노출 60분후에는 모든 선충이 치사되었다. UV-C 조사는 곤충병원성선충의 병원성에도 영향을 미쳐 노출 10분 후에도 누에나방 3령충에 대하여 6.7% 이하의 보정사충율을 나타내었다. 야외 뽕나무밭(UV량: $2.3mW/cm^2$)에서 곤충병원성선충, S. carpocapsae Pocheon strain을 엽면 살포 4시간 후 채취한 뽕나무 잎을 급상한 누에는 치사되지 않았다. 뽕잎에서 $4.0mW/cm^2$의 UV 1시간 노출은 곤충병원성선충, S. carpocapsae Pocheon strain의 누에에 대한 병원성에 차이를 보이지 않았다.

This study was conducted to find a useful alternative herbivore system with which to study the effects of ultraviolet exposure on the pathogenicity and survival of Korean isolated entomopathogenic nematodes (Heterorhabditis sp. 202 strain, Heterorhabditis sp. Gyeongsan strain, Steinernema sp. 223 strain, S. carpocapsae Pocheon strain, S. glaseri Dongrae strain and S. longicaudum Nonsan strain). Pathogenicity of entomopathogenic nematodes against silkworm, Bombyx mori, differed depending on the nematode species and strain and instar of silkworm challenged. Steinernematidae were relatively more pathogenic to the 5th instar silkworms, whereas Heterorhabditidae were more pathogenic to the 1st instars. UV-C exposure was harmful to entomopathogenic nematodes. All nematodes were killed within 60 minutes of exposure of UV-C, and after 10 min of exposure they caused only 6.7% corrected mortality of silkworms. Silkworms were not infected when they were fed S. carpocapsae Pocheon strain treated mulberry leaves which were exposed to UV intensity of about $2.3mW/cm^2$ for 4 hours in the field. Pathogenicity of S. carpocapsae was not significantly reduced after 1 hour of exposure to $4.0mW/cm^2$ UV intensity on the mulberry leaves against silkworms.

키워드

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