Korean Journal of Nature Conservation (한국자연보호학회지)

Korean Journal of Nature Conservation (한국자연보호학회)
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A study on application of Pseudococcus comstocki (Kuwana) (Hemiptera: Pseudococcidae) by new native natural enemy (Chrysoperla nipponensis (Okamoto)) (Neuroptera: Chrysopidae) on tropical plant (Trachycarpus fortunei (Hook))

열대 관상식물, 당종려나무를 가해하는 가루깍지벌레에 대한 신규 토착천적(Chrysoperla nipponensis (Okamoto))의 적용가능성 진단

  • Received : 2013.10.31
  • Accepted : 2013.11.29
  • Published : 2013.12.31
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Abstract

Biological control of Pseudococcus comstocki (Kuwana) with new indigenous natural enemy (Chrysoperla nipponensis (Okamoto)) was carried out on tropical plant (Trachycarpus fortunei (Hook)) from May to July in 2013. Control experiments were conducted at Tropical Plant Resources Research Center of Korea National Arboretum, Pocheon, Korea. Chrysoperla nipponensis was released once ($20larvae/m^2$) to control Pseudococcus comstocki on 11st May in 2013. We investigated the density of leaf-feeding P. comstocki at intervals of approximately 7 days after introducing their natural enemy, C. nipponensis. The densities of P. comstocki were suppressed 22.4% (after 4 weeks) and 8.2% (after 6 weeks) after introducing C. nipponensis.

국내에 자생하는 포식성 토착 천적인 Chrysoperla nipponensis(Okamoto)를 이용하여 열대식물인 당종려나무(Trachycarpus fortunei(Hook))에 대량 발생한 가루깍지벌레(Pseudococcus comstocki(Kuwana)))에 대한 생물적방제 가능성을 확인하였다. 방제실험은 국립수목원내 열대식물자원연구센터 유리온실에서 진행하였으며 인공사육된 대상식물을 가해하는 가루깍지 벌레의 사전밀도를 조사한 후 C. nipponensis를 대상 식물에 직접 방사(20개체/$m^2$)한 후 7일 간격으로 가루깍지벌레의 밀도를 조사하였다. 조사결과 C. nipponensis의 방사 후 2주차 이후부터 가루깍지벌레의 밀도가 줄어들기 시작했으며 방사 후 4주차에 최초 방사시점 대비 22.4% 수준으로, 6주차에 8.2%수준으로 해충의 밀도가 조절되었고 9주차 이후에는 가루깍지벌레를 확인할 수 없었다. 최초 해충 발생시기 예찰 및 방사량 조절을 통해서 온실내 관상용 수목류를 대상으로 C. nipponensis를 이용한 가루깍지 벌레의 방제가 가능함을 확인하였다.

Keywords

Acknowledgement

Supported by : 농촌진흥청

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