Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Changes in Catch Rate of Monochamus saltuarius (Coleoptera: Cerambycidae) Relation to Sexual Maturation

북방수염하늘소(딱정벌레목: 하늘소과)의 성적 성숙에 따른 포획 효율의 변화

  • Jung, Jong-Kook (Division of Insect Pests and Disease, National Institute of Forest Science) ;
  • Kwon, Hyeokjun (Division of Insect Pests and Disease, National Institute of Forest Science) ;
  • Kim, Hwang (Division of Insect Pests and Disease, National Institute of Forest Science) ;
  • Kim, Junheon (Division of Insect Pests and Disease, National Institute of Forest Science) ;
  • Nam, Youngwoo (Division of Insect Pests and Disease, National Institute of Forest Science) ;
  • Kim, Dongsoo (Division of Insect Pests and Disease, National Institute of Forest Science) ;
  • Jung, Chansik (Division of Insect Pests and Disease, National Institute of Forest Science)
  • 정종국 (국립산림과학원 산림병해충연구과) ;
  • 권혁준 (국립산림과학원 산림병해충연구과) ;
  • 김황 (국립산림과학원 산림병해충연구과) ;
  • 김준헌 (국립산림과학원 산림병해충연구과) ;
  • 남영우 (국립산림과학원 산림병해충연구과) ;
  • 김동수 (국립산림과학원 산림병해충연구과) ;
  • 정찬식 (국립산림과학원 산림병해충연구과)
  • Received : 2020.08.13
  • Accepted : 2020.09.17
  • Published : 2020.12.01
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Abstract

In this study, we aimed to investigate the changes in the catch rate of Monochamus saltuarius, based on sexual maturation by using aggregation-sex pheromone traps. Ovariole development of caught M. saltuarius females was compared to that of the ones not caught using traps. In a mesh cage set up at the Hongneung experimental forest, we placed a multi-funnel trap with or without an aggregation-sex pheromone lure. M. saltuarius adults, which emerged from pine logs, were grouped in four according to the emergence dates (0, 1, 7, and 10 days after emergence [DAE]). We released beetles into the mesh cage to investigate the catch rate using the traps. In each group, a total of 80 beetles (20 beetles × 4 replications) were tested, making it a total of 320 beetles. Among the four groups, M. saltuarius adults in the 7 DAE group were caught more frequently using the traps, especially with a pheromone lure; the other groups showed a low catch rate. A similar number of female and male beetles were caught using the traps. Regarding ovariole development, all the female adults in the 0 and 1 DAE groups were immature, while those in the other two groups were completely developed. Therefore, aggregation-sex pheromone traps might have a limitation in the prevention of pine wilt disease because of the transmission of pine wood nematode during maturation feeding of newly emerged M. saltuarius adults. However, aggregation-sex pheromone traps can be effective for collecting sexually mature M. saltuarius adults, for the investigation of seasonal occurrence of beetles in forests.

본 연구는 북방수염하늘소 성충이 집합-성 페로몬 트랩에 유인되는 시기를 명확하게 규명하기 위해 수행하였다. 또한 집합-성 페로몬에 유인된 개체의 난황 성숙도를 조사하여 집합-성 페로몬 트랩에 유인되지 않은 개체와 비교하였다. 이를 위해 홍릉시험림 내 망실 안에 유인제인 집합-성 페로몬을 매단 다중깔때기트랩과 집합-성 페로몬을 매달지 않은 다중깔때기 트랩을 각각 1개씩 배치하고, 우화망실에서 채집한 북방수염하늘소 성충을 우화시기별(우화 직후, 후식 1일차, 후식 7일차, 후식 10일 경과 후 교미)로 그룹화한 후 트랩이 배치된 망실 안에 방사하여 트랩에 포획 여부를 조사하였다. 각각의 시기별로 80개체(20개체씩 4반복)를 대상으로 실험하여 총 320개체를 망실 내에 방사하였다. 조사 결과, 우화 후 7일 동안 섭식한 개체들의 유인 포획률이 가장 높았으며, 교미 후에는 유인 포획률이 급격히 낮아지는 경향이었다. 또한 집합-성 페로몬이 있는 경우에만 후식 7일차 그룹의 유인 포획률만 통계적으로 유의미한 차이를 보였다. 성별에 따른 유인 포획률의 경우, 암컷이 수컷에 비해 많이 포획되긴 하였으나, 암컷과 수컷 간의 유인 포획률 차이는 없는 것으로 확인되었다. 우화 직후와 후식 1일차에는 모든 개체에서 난황이 미성숙한 상태였으나, 후식 7일차와 교미 후에는 모든 개체에서 성숙한 난황을 확인할 수 있었다. 따라서 페로몬트랩은 우화 후 초기에 후식을 통한 소나무재선충 전파가 가능하므로 소나무재선충병의 확산 억제를 막기에는 제한적일 가능성이 있다. 반면, 성적으로 성숙한 성충을 포획하고, 야외 발생을 조사하는 등으로는 활용 가능성이 있을 것이다.

Keywords

References

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