The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Insecticidal Activity of Metarhizium anisopliae FT83 against the Different Stages of Beet Armyworm, Spodoptera exigua

곤충병원성 곰팡이 Metarhizium anisopliae FT83의 파밤나방 생육단계별 살충활성

  • Han, Ji Hee (Agricultural Microbiology Division, National Academy of Agricultural Science, RDA) ;
  • Kim, Jeong Jun (Agricultural Microbiology Division, National Academy of Agricultural Science, RDA) ;
  • Lee, SangYeob (Agricultural Microbiology Division, National Academy of Agricultural Science, RDA)
  • 한지희 (농촌진흥청 국립농업과학원 농업미생물과) ;
  • 김정준 (농촌진흥청 국립농업과학원 농업미생물과) ;
  • 이상엽 (농촌진흥청 국립농업과학원 농업미생물과)
  • Received : 2014.11.12
  • Accepted : 2014.12.09
  • Published : 2014.12.31
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Abstract

The beet armyworm, Spodoptera exigua is pest which is difficult to control. For eco-friendly beet armyworm managements, we isolated entomopathogenic fungi from soil samples by insect-bait method using Tenebrio molitor and conducted bioassay to larvae of beet armyworm. The result of bioassay, a selected strain Metarhizium anisopliae FT83 caused 100% mortality against first ~ third instar larva of S. exigua at $1{\times}10^8conidia/ml$ and medial lethal time ($LT_{50}$) were 0.5 days, 2.6 days and 2.5 days respectively. Mortality against fourth and fifth larvae were $83.3{\pm}6.2%$ and $86.0{\pm}5.7%$ and medial lethal time ($LT_{50}$) were 4.2 days and 3.6 days respectively. Mortality against pupae and eggs of S. exigua were 100%. M. anisopliae FT83 showed high virulence at all developmental stages of S. exigua.

난방제 해충인 파밤나방의 친환경적 방제를 위하여 토양에서 곤충병원성 곰팡이를 수집한 다음, 파밤나방 유충에 대해 우수한 방제효과가 있는 곰팡이 Metarhizium anisopliae FT83을 분리하여 파밤나방의 생육단계별 살충율을 검정하였다. M. anisopliae FT83의 파밤나방 1령~3령 유충에 대한 살충율은 $1{\times}10^8conidia/ml$ 수준에서 100%이었고 반수치사시간은 0.5일, 2.6일, 2.5일이었으며 4령과 5령에 대한 살충율은 각각 $83.3{\pm}6.2%$, $86.0{\pm}5.7%$였으며 반수치사시간은 4.2일, 3.6일이었다. 번데기와 알에 대한 살충율도 100%로 파밤나방의 전 생육단계에 대해 높은 살충활성을 나타내었다.

Keywords

References

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