Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Damage analysis and Control threshold of Frankliniella occidentalis Pergande (Thysanoptera: Thripidae) on Greenhouse Eggplant and Sweet pepper

시설재배 가지, 피망에서 꽃노랑총채벌레 피해해석과 방제수준

  • Park, Hong-Hyun (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Kwang-Ho (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Chang-Gyu (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Choi, Byeong-Ryeol (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Jeong-Jun (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Si-Woo (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Sang-Guei (Division of Applied Entomology, Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration)
  • 박홍현 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과) ;
  • 김광호 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과) ;
  • 박창규 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과) ;
  • 최병렬 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과) ;
  • 김정준 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과) ;
  • 이시우 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과) ;
  • 이상계 (농촌진흥청 국립농업과학원 농업생물부 곤충산업과)
  • Published : 2009.06.30
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Abstract

Cage experiments by artificial infestations with different initial densities of Frankliniella occidentalis were conducted to analyze damages and develop control thresholds of F. occidentalis on greenhouse eggplant in 2005 and on greenhouse sweet pepper in 2007. In the eggplant experiment, the infestations of F. occidentalis resulted in direct damage on fruit surface and non-marketable fruits which had several thin or thick lines or bleaching patches on the surface. F. occidentalis adults were frequently found on the flowers of eggplants, while nymphs were mainly observed on leaves. The fruit yield of eggplants was not significantly different among experimental plots with different initial density of F. occidentalis. Relationship between % non-marketable fruits among harvested fruits of eggplant and sticky trap catches of F. occidentalis (no. thrips/trap/week) at two weeks before the harvest showed a positive correlation. Using the estimated relationship, the control threshold of F. occidentalis on greenhouse eggplant was estimated at 10 adults per week at two weeks before the harvest when 5% of non-marketable fruit was applied for the gain threshold. In the experiment of sweet pepper, the direct damage by F. occidentalis was observed on the fruit surface and calyx, and the marketable grade of the damaged fruits decreased. The significant yield loss of marketable fruits was found in plots with high initial introduced-densities. There was a high relationship between thrips density and percentage of damaged fruits. Assuming 5% yield loss (non-marketable fruit) for the gain threshold, the control threshold of F. occidentalis on greenhouse sweet pepper was 4.8 adults per trap and 0.9 individuals per flower at two weeks before harvest.

시설재배 가지 및 피망에서 꽃노랑총채벌레의 가해에 따른 피해양상과 방제수준 설정을 인위적인 충 접종과 케이지 실험을 통해 조사하였다. 2005년 가지 실험결과, 꽃노랑총채벌레 가해에 의한 직접적인 피해는 가지 과실에서 나타났고, 여러 개의 가는 선과 굵은 선을 동시에 갖거나 과실 표면이 일부 표백된 피해가 심한 과실은 상품성이 하락하였다. 꽃노랑총채벌레는 가지 꽃에서는 성충태가, 앞에서는 유충태가 주로 발견되었다. 꽃노랑총채벌레 밀도 수준에 따른 시험구간 수량차이는 발견되지 않았다. 시험구의 꽃노랑총채벌레 발생밀도(수확 2주전 일주일간 끈끈이트랩 밀도)와 각 수확시 비상품과율간에는 정의 상관 관계가 있었다. 황색 끈끈이트랩 이용시 방제수준을 피해과율 5%를 유발하는 총채벌레 밀도로 가정했을 때 가지 수확 2주전에 일주일간 성충 유살수가 10마리 되는 수준이었다. 2007년 피망 실험결과, 꽃노랑총채벌레에 의한 피해는 피망의 과실표면, 꽃받침에 뚜렷하게 나타났고, 과실에서 피해가 심할 경우 상품성이 하락되었다. 밀도가 높은 시험구들에서는 상품과의 수량에 유의한 감소가 있었다. 피망에서 꽃노랑총채벌레 밀도와 피해과율에는 높은 상관관계가 있었고, 피해과율 5%를 유발하는 꽃노랑 총채벌레 밀도수준은 수확2주전 끈끈이트랩 유살수의 경우 일주일간 채집된 개체수가 4.8마리, 꽃에서 발생밀도의 경우는 0.9마리 수준이었다.

Keywords

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