The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Insecticidal Activities and Synergism of Bistrifluron Against EPN-Resistant Strain of Diamondback Moth, Plutella xylostella (Lepidoptera: Plutellidae)

EPN 저항성 배추좀나방에 대한 IGR계 약제 Bistrifluron의 살충활성과 세 가지 협력제에 의한 살충활성 증진 효과

  • Joo, You-Lee (Dept. of Plant Medicine, College of Agriculture, Life, and Environment Sciences, Chungbuk National University) ;
  • Yang, Jeong-Oh (Dept. of Plant Medicine, College of Agriculture, Life, and Environment Sciences, Chungbuk National University) ;
  • Yoon, Chang-Mann (Dept. of Plant Medicine, College of Agriculture, Life, and Environment Sciences, Chungbuk National University) ;
  • Kim, Gil-Hah (Dept. of Plant Medicine, College of Agriculture, Life, and Environment Sciences, Chungbuk National University)
  • 주유리 (충북대학교 농업생명환경대학 식물의학과) ;
  • 양정오 (충북대학교 농업생명환경대학 식물의학과) ;
  • 윤창만 (충북대학교 농업생명환경대학 식물의학과) ;
  • 김길하 (충북대학교 농업생명환경대학 식물의학과)
  • Published : 2009.03.31
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Abstract

EPN-resistant diamondback moth were tested the developmental characteristics, longevity, fecundity and synergistic effect with synergists when treated with the bistrifluron, an inhibitor of chitin synthesis. Inhibition rate of egg hatch was below at the recommended concentration (50 ppm) to the EPN-resistant strain than EPN-non selected strain, however, mortality within 24hr after hatching was showed as 50-60%. They did not show the difference between two strains. Mortality of larval instars were showed effective to two strains with no difference. Inhibition rate of emergence did not show any effect when treated with pupae. Moreover, they did not affect to the longevity and fecundity. When bistrifluron was treated at 50 ppm to the adult, however, longevity and fecundity was decreased with no difference between two strains. Bistrifluron to the EPN-resistant strain showed synergistic effect as high as 137.7 and 73.1 folds with synergist such as PBO (microsomal oxidase inhibitor) and polyoxin B (chitin synthetase inhibitor), respectively.

EPN-저항성 배추좀나방에 대한 chitin 생합성저해제인 bistrifluron의 발육단계별 살충활성, 성충수명 및 산란수에 미치는 영향을 조사하였다. 알에 대한 부화억제율은 추천농도(50 ppm)에서 낮았지만, 부화유충의 치사율이 50-60%를 나타내었고, 두 계통간에는 차이가 없었다 영기별 살충효과는 감수성 계통과 저항성 계통 모두에 효과가 있었다. 하지만 계통간에 차이는 크지 않았다. 번데기에 처리시 우화억제율은 거의 없었으며, 또 성충의 수명과 산란수에도 영향을 미치지 않았다. 성충에 처리했을 때 50 ppm농도에서 성충수명과 산란수는 감소하였지만 두계통간에 차이는 없었다. EPN저항성계통에 대한 bistrifluron과 협력제 piperonyl butoxide(microsomal oxidase inhibitor)와 polyoxin B(chitin synthetase inhibitor)는 각각 137.7배와 73.1배로 높은 협력작용을 나타내었다.

Keywords

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