Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Annual Occurrent Pattern of Scirtothrips dorsalis (Thysanoptera: Thripidae) on Citrus Trees and Surrounding Host Plants

감귤원과 그 주변 기주식물에서 볼록총채벌레의 연중발생 양상

  • Song, Jeong Heub (Division of Sustainable Agricultural Research, Jeju Agricultural Research and Extension Services) ;
  • Kim, Chang Seog (Crop Protection Division, National Academy of Agricultural Science, RDA) ;
  • Yang, Young Taek (Division of Sustainable Agricultural Research, Jeju Agricultural Research and Extension Services) ;
  • Hong, Soon Yeong (Division of Sustainable Agricultural Research, Jeju Agricultural Research and Extension Services) ;
  • Lee, Shin Chan (Division of Sustainable Agricultural Research, Jeju Agricultural Research and Extension Services)
  • 송정흡 (제주특별자치도농업기술원 친환경연구과) ;
  • 김창석 (농촌진흥청 국립농업과학원 작물보호과) ;
  • 양영택 (제주특별자치도농업기술원 친환경연구과) ;
  • 홍순영 (제주특별자치도농업기술원 친환경연구과) ;
  • 이신찬 (제주특별자치도농업기술원 친환경연구과)
  • Received : 2013.02.25
  • Accepted : 2013.05.28
  • Published : 2013.09.01
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Abstract

The damage of citrus by Scirtothrips dorsalis Hood appears to have increased since 2007 in Jeju, although the characteristics of seasonal abundance are not clear. This study was conducted to investigate the relationship between host plants and the seasonal abundance of S. dorsalis, observing plants distributed around citrus orchards. The host plants of S. dorsalis surrounding citrus orchards were determined to include 32 families, 54 species: 39 woody plant species and 15 herbaceous plant species. The host plants which related to the occurrence of 1st generation of S. dorsalis were Lonicera japonica, Clematis apiifolia, Hedera rhombea, and Viburnum awabuki. The occurrence of 1st generation S. dorsalis was estimated to be due to overwintered female adults having laid eggs into those plants from late March to early April, and the new adults having emerged from late April to late May. The host plants which were associated with fruit damage of citrus were Mallotus japonicus, and Camellia japonica, as well as creeping plants such as Clematis apiifolia, Paederia scandens and Cayratia japonica. The adult phase density of S. dorsalis caught on yellow-color sticky traps placed on the citrus trees on the edge of the citrus orchard. S. dorsalis were predominantly 3rd generation from late of June to early of July, and 6th generation from late of August to early of September, and their numbers were directly related to the degree of damage caused to the citrus fruit. The density of S. dorsalis depended on the number of new growing shoots of host plants, which indicated that the immigration of adults of S. dorsalis to the citrus was based in the suitability of host plants surrounding the orchards.

제주지역 노지감귤에서 2007년부터 볼록총채벌레 Scirtothrips dorsalis Hood에 의한 피해가 증가하고 있으나 시기별 발생특성에 관한 연구는 명확하지 못한 실정이다. 본 연구에서는 감귤원 주변에 분포하고 있는 볼록총채벌레의 기주식물 종류와 이와 연관된 발생특성을 구명하였다. 감귤원 주변에서 조사된 볼록총채벌레의 기주식물은 수목류 23과 39종, 초본류 10과 15종으로 총 32과 54종이었다. 조사된 기주식물 중 볼록총채벌레 제1세대 발생과 관련된 것은 인동덩굴과 사위질빵, 송악, 아왜나무였으며, 이들 식물에 월동성충이 3월 하순~4월 상순에 산란하여 성충이 4월 하순~5월 하순에 발생되는 것으로 추정되었다. 감귤 피해와 관련된 기주식물은 예덕나무와 동백나무 그리고 사위질빵, 계요등, 거지덩굴 같은 덩굴성 식물이었다. 황색끈끈이트랩을 감귤나무와 감귤원 경계에 설치하여 볼록총채벌레의 시기별 발생밀도를 조사한 결과 비슷한 발생양상을 보였으며, 연간 7세대를 경과하는 것으로 추정되었다. 감귤 열매에 피해를 주는 시기는 6월 하순~7월 상순과 8월 하순~9월 상순으로 어린 열매와 성숙 초기 2회에 걸쳐 피해를 주며, 이는 각각 볼록총채벌레 제 3세대와 제 6세대 성충 발생 최성기와 일치하였다. 볼록총채벌레 발생밀도는 기주식물의 새순 발생량에 따라 차이가 컸으며, 감귤원 주변 기주식물에서 번식한 후 감귤나무로 이동하여 피해를 주는 것으로 나타났다.

Keywords

References

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