The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Effect of Neem and Mustard oils on Entomopathogenic Nematodes and Silkworm

Neem과 mustard oil이 곤충병원성 선충과 누에에 미치는 영향

  • Ha, Pan-Jung (Sesil Cooperation) ;
  • Kim, Tae-Su (Sesil Cooperation) ;
  • Lee, Shin-Hae (Division of Applied Life Science (BK21), Institute of Agriculture and Life Sciences, Gyeongsang National University) ;
  • Choo, Ho-Yul (Division of Applied Life Science (BK21), Institute of Agriculture and Life Sciences, Gyeongsang National University) ;
  • Choi, Sung-Hwan (KCP Agrotechnology Research Institute) ;
  • Kim, Young-Sub (Department of Applied Biology, Kyungpook National University) ;
  • Lee, Dong-Woon (Department of Applied Biology, Kyungpook National University)
  • Received : 2010.02.10
  • Accepted : 2010.02.27
  • Published : 2010.03.31
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Abstract

Effects of thirteen essential oils (anise oil, clove oil, marigold, mustard oil, neem oil, quassia, quilaja, rosemary oil, rotenone, tea tree extract, thyme oil, wintergreen oil, and yucca) and caffeine on typical industrial insect, silkworm (Bombyx mori) and two entomopathogenic nematodes, Steinernema carpocapsae GSN-1 strain (Sc) and Heterorhabditis sp. Gyeongsan strain (Hg) were investigated in the laboratory. When 1,000 ppm of each essential oils was treated, neem oil showed the highest insecticidal activity against silkworm. Mortality of silkworm fed on neem oil treated mulberry leaf was 55.3 and 100% 5 and 10 days after treatment, respectively. The silkworm fed on neem oil treated mulberry leaf did not make cocoon and pupa. Weight of cocoon and pupa was low in rotenone treatment showing 0.27 g and 1.01 g, respectively. Mustard oil had the highest nematicidal activity against entomopathogenic nematodes. 20 ppm of mustard oil resulted in 69.0% and 100% mortality of Sc and Hg 3 days after treatment, but 4% and 36% at 5 ppm in X-plate, respectively. Mortality of baited Galleria mellonella larva by Sc was not different from control at the concentration of 100 ppm of mustard oil while 30% lower in Hg in sand barrier. Mean numbers of established infective juveniles of Hg in Galleria larva were lower than Sc in sand barrier. Survival rate of Sc was similar to control at the concentration of <200 ppm of mustard oil in sand barrier.

13종의 식물 정유(anise oil, clove oil, marigold, mustard oil, neem oil, quassia, quilaja, rosemary oil, rotenone, tea tree extract, thyme oil, wintergreen oil, and yucca)와 caffeine이 산업곤충인 누에(Bombyx mori)와 생물적 방제 인자의 하나인 곤충병원성 선충 Steinernema carpocapsae GSN-1 계통(Sc)과 Heterorhabditis sp. Gyeongsan 계통(Hg)에 미치는 영향을 실내 검정하였다. 1,000 ppm 농도의 식물체 추출물들 중 neem oil이 누에에 대한 살충활성이 가장 높았다. Neem oil을 처리한 뽕잎을 공급하였을 때, 급상 5일과 10일 후 누에의 치사율은 각각 55.3%와 100%였다. 그리고 neem oil이 처리된 뽕잎을 섭식한 누에는 번데기와 고치를 형성하지 못하였다. Rotenone을 처리한 뽕잎을 공급받은 누에의 고치와 번데기 무게는 각각 0.27 g과 1.01 g으로 가장 적었다. Mustard oil은 곤충병원성선충에 대하여 살선충 활성이 높았다. X-plate에서는 mustard oil 20 ppm 처리 시 곤충병원성선충 Sc와 Hg의 치사율이 처리 3일 후 각각 69.0%와 100%였으며 5 ppm 농도에서도 4%와 36%의 치사율을 보였다. Sand barrier에서 Sc를 100 ppm 농도의 mustard oil과 혼합 처리 시 꿀벌부채명나방(Galleria mellonella) 노숙 유충의 치사율은 무처리구와 차이가 없었으나 Hg의 경우는 무처리구에 비하여 30% 낮은 꿀벌부채명나방 치사율을 보였다. 꿀벌부채명나방 유충의 체내에 정착한 선충 수는 Hg가 Sc에 비하여 적었다. Sand barrier내 생존 Sc 선충 수는 200 ppm 이하 농도에서는 무처리구와 차이가 없었다.

Keywords

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