Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Injury Characteristics of Allium Leafminer, Acrolepiopsis sapporensis (Lepidoptera: Acrolepiidae) in Welsh Onion and Damage Assessment According to Larval Density Levels during Summer

대파에서 파좀나방 가해 특성과 여름기간동안 유충밀도에 따른 피해해석

  • Park, Hong-Hyun (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Kwang-Ho (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Chang-Gyu (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Choi, Yong-Seok (Bioenvironment Research Division, Chungcheongnam-do Agricultural Research & Extension Services) ;
  • Lee, Sang-Guei (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration)
  • 박홍현 (농촌진흥청 국립농업과학원 작물보호과) ;
  • 김광호 (농촌진흥청 국립농업과학원 작물보호과) ;
  • 박창규 (농촌진흥청 국립농업과학원 작물보호과) ;
  • 최용석 (충청남도농업기술원 농업환경연구과) ;
  • 이상계 (농촌진흥청 국립농업과학원 작물보호과)
  • Received : 2012.09.11
  • Accepted : 2012.10.17
  • Published : 2012.12.01
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Abstract

This study was conducted to assess damage to the welsh onion by Acrolepiopsis sapporensis Mastumura (Lepidoptera: Acrolepiidae) during the summer season, and to estimate the economic injury level (EIL) which results, providing basic data for pest management. The adult peaks of A. sapporensis in Suwon were observed in March, April, May, and September of 2009 and 2010 through the use of pheromone traps. The feeding of A. sapporensis results in white lines on the surface, and holes within welsh onions. During the entire larval period, one larva was able to damage 1.6 leaves and punch 11.9 holes, resulting in a total damaged leaf area of $1,321.6mm^2$. Through cage experiments and larval releases, a reduction of the mean number of leaves, increased percentage of leaf damage, and reduction in gross weight and marketable weight were observed. We could obtain a regression equation that showed a clear positive correlation between pest density and percentage of damaged leaf. Using this equation, the EIL of A. sapporensis on welsh onion was calculated to one larva per 10 plants based on 7% leaf damage observed for welsh onion.

본 연구는 여름기간동안 대파에서 파좀나방 밀도에 따른 피해수준을 분석하고, 해충관리의 기초자료인 경제적피해수준을 제시하고자 수행되었다. 2009년부터 2010년까지 수원지역 대파 재배포장에서 성페로몬 트랩을 이용한 성충 발생 모니터링 결과, 3~5월, 9월에 특히 많은 개체가 채집되었다. 파좀나방의 가해양상은 유충이 잎을 뚫고 들어가 내부에서 갉아먹으면 잎 표면이 초록빛을 잃고 하얗게 변하였고, 구멍이 생겨났다. 유충 1마리가 전체 유충기간동안 평균 1.6개 잎을 가해하였고, 11.9개의 구멍을 냈으며 피해면적은 $1,321.6mm^2$에 달했다. 망사케이지에 파좀나방 유충을 밀도수준별로 접종한 결과, 파좀나방 밀도수준에 따라 파의 평균 엽수의 감소와 피해엽률의 증가에 따라 총 수량 및 상품수량이 감소되었다. 피해해석 결과, 해충밀도와 피해엽률간에는 고도로 유의한 정(+)의 상관관계가 있는 회귀식을 구할 수 있었다. 이 식을 이용하여 대파의 상품화율 93%를 감안하여 설정한 피해한도인 피해엽률 7% 수준에서 파좀나방의 경제적 피해수준은 10주당 유충 1마리로 추정되었다.

Keywords

References

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