Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Seasonal Occurrence of Yellow Tea Thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) in Citrus Orchards and Its Damage Symptoms on Citrus Fruits

노지재배 감귤에서의 볼록총채벌레 발생 양상과 피해 증상

  • Hyun, Jae-Wook (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA) ;
  • Hwang, Rok-Yeon (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA) ;
  • Lee, Kwan-Seok (Crop Protection Division, National Academy of Agricultural Science, RDA) ;
  • Song, Jeong-Heub (Division of Sustainable Agricultural Research, Jeju Special Self-Governing Province Agricultural Research & Extension Services) ;
  • Yi, Pyoung-Ho (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA) ;
  • Kwon, Hyeog-Mo (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA) ;
  • Hyun, Dong-Hee (Seogwipo Agricultural Technology Service Center, Jeju Special Self-Governing Province Agricultural Research & Extension Services) ;
  • Kim, Kwang-Sik (Citrus Research Station, National Institute of Horticultural & Herbal Science, RDA)
  • 현재욱 (국립원예특작과학원 감귤시험장) ;
  • 황록연 (국립원예특작과학원 감귤시험장) ;
  • 이관석 (농업과학기술원 작물보호과) ;
  • 송정흡 (제주도농업기술원 친환경농업과) ;
  • 이평호 (국립원예특작과학원 감귤시험장) ;
  • 권혁모 (국립원예특작과학원 감귤시험장) ;
  • 현동희 (제주도농업기술원 서귀포농업기술센타) ;
  • 김광식 (국립원예특작과학원 감귤시험장)
  • Received : 2011.09.20
  • Accepted : 2012.02.07
  • Published : 2012.03.01
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Abstract

Silver-grey or dark brown scaring, or dark brown discolored damages caused by the yellow tea thrip, $Scirtothrips$ $dorsalis$ Hood (Thysanoptera: Thripidae) have occurred on citrus fruits cultivated in the open field in east-south area orchards of Jeju Island since 2007. The weekly population of yellow tea thrips adults caught with a yellow sticky trap increased gradually from early May and peaked in late August, 2009. In 2010 and 2011, the most population was in early October. The yellow tea thrips of some species usually dominated from July in open citrus fields, and seven generations, at least, had occurred from May to late October 2009 by a yellow sticky trap survey. In 2009, $S.$ $dorsalis$ larva were observed from July and with peaks from late August to mid September and early October on citrus fruits. The damage symptoms appeared in the mid September. In 2011, the population peaks were in early July and late September, and the symptoms increased continually from mid July to late October. The symptoms were silver-scars or initial dark discolorations and then gradually changed to dark-brown discolorations or dark-brown scars. The percent of damaged fruits were 0.9%, 0.4%, 0.8% and 2.7% in 2008, 2009, 2010 and 2011, respectively, by survey in 64 typical orchards in Jeju Island. We are the first to report symptoms of the yellow tea thrip ($Scirtothrips$ $dotsalis$) on citrus fruits.

최근 들어 노지재배 감귤에서 볼록총채벌레에 의해 검은점무늬병 후기 증상 및 녹응애 피해 증상과 매우 유사하게 과정부 주위를 중심으로 검붉게 그을린 증상 또는 조직이 회갈색으로 괴사되어 딱지형태가 되는 증상들이 2007년부터 서귀포시 남원읍 일부지역에 발생하여 큰 피해를 주고 있다. 황색 끈끈이 트랩을 이용하여 7일 마다 발생 밀도를 조사한 결과 2009년의 경우 5월 상순부터 발생하기 시작하여 꾸준히 증가하다 8월 하순에 밀도가 가장 높았으며 2010년과 2011년의 경우 10월 상순에 밀도가 가장 높았다. 2009년의 경우 5월부터 10월 하순까지 최소 7회의 발생 세대를 보였고 통상 7월 경부터 볼록총채벌레가 감귤원에서 우점하여 발생하였다. 과실에서 볼록총채벌레 약충들이 7월부터 발견되어 2009년의 경우 8월 하순부터 9월 중순, 그리고 10월 상순에 피크를 보였고 피해 증상은 9월 중순부터 발생하기 시작하였다. 2011년의 경우 7월 상순에 밀도가 매우 높았으며 이후 9월 하순에 다시 밀도가 증가하였고 피해 증상은 7월 중하순 부터 발생하기 시작하여 10월 하순까지 계속적으로 증가하였다. 피해증상은 과정부를 중심으로 회색빛으로 부스럼같이 코르크화 되거나 초기에 검은색을 띄다가 착색기에 접어들어 과피가 검붉게 변하였다. 감귤에서 볼록총채벌레에 의한 이런 피해 증상을 국내에 처음으로 보고한다.

Keywords

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