Annual Fluctuations in Population of the Pine Needle Gall Midge, Thecodiplosis japonensis, and its Parasitoids in Kyeongbuk Province, Korea

경북지역에서의 솔잎혹파리(Thecodiplosis japonensis)와 솔잎혹파리기생봉의 개체군 변동

  • Jeon, Mun-Jang (Department of Forest Resources, College of Life and Environment, Daegu University) ;
  • Shin, Sang-Chul (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Chung, Yeong-Jin (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Kim, Chul-Su (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Choi, Kwang-Sik (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Park, Il-Kwon (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Jang, Jeong-Won (Department of Forest Resources, College of Life and Environment, Daegu University)
  • 전문장 (대구대학교 생명환경대학 산림자원학과) ;
  • 신상철 (국립산림과학원 산림병해충과) ;
  • 정영진 (국립산림과학원 산림병해충과) ;
  • 김철수 (국립산림과학원 산림병해충과) ;
  • 최광식 (국립산림과학원 산림병해충과) ;
  • 박일권 (국립산림과학원 산림병해충과) ;
  • 장정원 (대구대학교 생명환경대학 산림자원학과)
  • Received : 2005.10.28
  • Accepted : 2006.05.02
  • Published : 2006.09.30

Abstract

This study was conducted to investigate the effect of parasititoids on the density-fluctuation of the pine needle gall midge, Thecodiplosis japonensis. The density of T. japonensis and its parasitoids was observed by emergence trap in pine forest in Namsung-dong, Keumho-eup, Youngcheon-shi, Kyeongsangbuk-do, Korea, from 1986 to 2005. After 1987, density fluctuations of adults pine needle gall midge and its parasitoids showed similar trends and density of parasitoids was dependent on density of host population. Sex ratio of the pine needle gall midge, T. japonensis, was female-biased and had some variations in according to years. These trends were similar to those of parasitoid populations and sex ratio of Inostemma seoulis was more female-biased than that of I. matsutama. T. japonensis adults emerged in the field from May 16 to July 27 and the peak of emergence was between late May and early June. The adults of Inostemma matsutama emerged from May 16 to June 11 (peak between late May and early June), whereas those of Inostemma seoulis emerged from June 9 to July 27 (peak: late June).

본 연구는 기생봉이 솔잎혹파리 밀도변동에 미치는 영향을 조사하기 위하여 경상북도 영천시 금호읍 남성동에 위치한 소나무림에서 우화트랩을 이용하여 1986년에서 2005년까지 20년간 솔잎혹파리와 각 종의 솔잎혹파리 기생봉 성충 밀도를 조사하였다. 1987년 이후 기주인 솔잎혹파리와 기생봉 개체군 동태는 유사한 양상을 보였으며 기생봉 밀도는 기주 의존적이었다. 솔잎혹파리 개체군의 성비는 전체적으로는 암컷의 비율이 높았으나 연도에 따라 차이를 보였다. 이러한 경향은 솔잎혹파리 기생봉 개체군에서도 유사하였으나 솔잎혹파리먹좀벌(Inostemma seoulis) 개체군의 성비가 혹파리반뿔먹좀벌(Inostemma matsutama) 개체군 성비보다 암컷편기가 심하였다. 기주인 솔잎혹파리는 매년 5월16일~7월27일(우화최성기 : 5월27일-6월5일)에 우화하였고, 그 기생봉인 혹파리반뿔먹좀벌과 솔잎혹파리먹좀벌은 5월16일~6월11일(우화최성기 : 5월27-6월2일) 및 6월9일~7월27일(우화최성기 : 6월23일~6월28일) 이었다.

Keywords

Acknowledgement

Supported by : 대구대학교

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