The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Mosquito Control Efficacy of a BtPlus Insecticide and Its Safety Assessment to Aquatic Environment

비티플러스 살충제의 모기 방제 효과 및 환경생물에 대한 안전성 평가

  • 박영진 (안동대학교 식물의학과) ;
  • 유성민 ((주)경농 중앙연구소) ;
  • 권보원 ((주)경농 중앙연구소) ;
  • 박찬 ((주)경농 중앙연구소) ;
  • 김진 ((주)경농 중앙연구소) ;
  • 김용균 (안동대학교 식물의학과)
  • Received : 2016.06.25
  • Accepted : 2016.09.11
  • Published : 2016.09.30
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Abstract

BtPlus is a group of biopesticides that are made of Bacillus thuringiensis and immunosuppressant. A new BtPlus that exhibits high insecticidal activity against mosquito larvae has been investigated in control efficacy in field conditions and its environmental safety against aquatic system. This study assessed the control efficacy of BtPlus against mosquito larvae with two different application methods. In aerial spraying application (100 mL per $3.3m^2$), BtPlus was effective at 50% or above formulation concentrations to control mosquito larvae. For a direct application to aqueous mosquito habitat, a semi-field mimicking paddy rice field was constructed. In this condition, BtPlus showed 80% and 100% control efficacies at 0.1% and 0.2% concentrations, respectively. BtPlus also showed 40% mortality against adults at 0.1% concentration in 10% sugar bait. However, its control efficacies against adults were much less than against larvae. Safety assessment of BtPlus against ecosystem was evaluated using young carp (Cyprinus carpio), a water flea (Daphnia magna), and a honey bee (Apis mellifera). BtPlus did not give any adverse effects on these nontarget organisms. Based on these results, BtPlus can be applied to control mosquitoes by direct aqueous application to paddy rice field.

비티플러스는 Bacillus thurigiensis와 면역억제가 혼합된 생물농약의 총칭이다. 본 연구는 모기류에 살충력이 높은 새로운 비티플러스 생물농약에 대해서 야외포장 조건에서 약효와 환경생물에 대한 안전성평가에 관해 수행되었다. 모기 유충에 대한 효과적 방제를 위해 두 가지 살포 처리에 따라 비티플러스의 방제 효과를 검증하였다. 비티플러스의 공중살포 ($3.3m^2$ 당 100 mL)에 따른 수계에 서식하는 모기 유충의 효과적 방제를 위해서는 최소 50%의 제제화 된 약제 농도가 요구되었다. 이에 반해 논생태계와 유사한 조건의 간이모형 조건에서 비티플러스를 수중살포한 경우 모기유충에 대한 비티플러스의 방제효과는 0.1%의 제제화 된 약제 농도에서 80% 이상의 살충 효과를 나타냈고, 0.2% 처리에서는 완전 방제 효과를 보여 주었다. 또한 유충에 비해서는 다소 낮지만 10% 설탕물에 포함된 0.1%의 비티플러스는 성충에 대해서도 40% 이상의 살충력을 나타냈다. 환경생물에 대한 안전성평가에서는 잉어 (Cyprinus carpio), 큰물벼룩(Daphnia magna), 꿀벌(Apis mellifera)을 대상으로 비티플러스에 대한 독성을 평가한 결과 급성적인 영향은 주지 않는 것으로 나타났다. 이러한 결과는 논생태계에 서식하는 모기 유충방제에 비티플러스의 수중살포 처리가 유효한 방제 처리라는 것을 제시하고 있다.

Keywords

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