한국응용곤충학회지 (Korean journal of applied entomology)

  • 제62권4호
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  • Pages.277-285
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  • 2023
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  • 1225-0171(pISSN)
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  • 2287-545X(eISSN)
한국응용곤충학회 (Korean Society of Applied Entomology)
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대파 재배지 파좀나방(Acrolepiopsis sapporensis) 발생 현황과 '비티플러스' 처리 효과

Occurrence of the Onion Moth, Acrolepiopsis sapporensis, in the Welsh Onion Farms and its Treatment Using 'BtPlus'

  • 투고 : 2023.06.12
  • 심사 : 2023.11.07
  • 발행 : 2023.12.01
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초록

대파(Allium fistulosum) 정식부터 수확기까지 성페로몬을 이용하여 재배지에 발생한 파좀나방(Acrolepiopsis sapporensis)을 모니터링하였다. 이 시기에 발생한 파좀나방은 월동세대 이후 6월 초와 7월 말에 각각 발생 최성기를 보였다. 그러나 발생량은 연도와 재배 환경에 따라 다르게 나타났다. 파좀나방을 효과적으로 방제하기 위한 미생물제제로서 Bacillus thuringiensis 균주를 스크리닝하였고, 이들 가운데 B. thuringiensis kurstaki (BtK)가 선발되었다. 선발된 BtK의 살충력을 높이기 위해 다른 곤충병원세균인 Photorhabdus temperata temperata (Ptt) 세균 배양액 추출물을 추가하였다. 이들 두 세균을 혼합한 '비티플러스'는 BtK 단독 보다 현격하게 높은 살충력을 나타냈다. 이러한 살충력 제고 원인은 Ptt 추출물에 포함된 대사물질에 의해 기인되었다. 이들 대사물질은 파좀나방의 세포성 및 체액성 면역반응을 억제하여 BtK의 살충력을 제고시킨 것으로 나타났다. 이상의 결과는 국내 대파 재배지에서 파좀나방이 지속적으로 발생하며, 이 해충에 의한 경제적 피해를 줄이기 위한 비티플러스의 효과적 방제 가능성을 제시하였다.

The onion moth, Acrolepiopsis sapporensis, was monitored in the farms cultivating the welsh onion, Allium fistulosum, using sex pheromone from transplantation to harvest. Two occurrence peaks were observed at early June and late July after the overwintering population. However, the population sizes were varied among different years and the cultivating environments. To effectively control A. sapporensis with microbial pesticides, different Bacillus thuringiensis strains were screened to select B. thuringiensis kurstaki (BtK). To enhance the insecticidal virulence of BtK, the culture broth of Photorhabdus temperata temperata (Ptt) was added to the BtK. This mixture of two entomopathogenic bacteria was called 'BtPlus', which was superior to BtK alone in the insecticidal virulence. The enhanced virulence was explained by the immunosuppressive activity of the secondary metabolites contained in the Ptt extract. The metabolites inhibited both cellular and humoral immune responses of A. sapporensis, resulting in the enhanced virulence of BtK. These results suggest that A. sapporensis occurs in the welsh onion fields and the resulting economic damage would be effectively prevented by BtPlus application.

키워드

과제정보

본 결과물은 농림축산식품부의 재원으로 농림식품기술기획평가원의 작물바이러스 및 병해충대응 산업화 기술개발사업의 지원(321100-3)을 받아 연구되었습니다.

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