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Insecticidal Activity and Effect on Biological Characteristic of 16 Insecticides Against Phthorimaea Operculella (Lepidoptera: Gelechiidae)

감자뿔나방에 대한 16종 살충제의 살충활성과 생물적 특성에 미치는 영향

  • An, Jeong-Jin (Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University) ;
  • Park, Jun-Won (Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University) ;
  • Kim, Ju-Il (Highland Agriculture Research Center, Rural Development Administration) ;
  • Kim, Hyun Kyung (Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University) ;
  • Koo, Hyun-Na (Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University) ;
  • Kim, Gil-Hah (Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University)
  • 안정진 (충북대학교 농업생명환경대학 식물의학과) ;
  • 박준원 (충북대학교 농업생명환경대학 식물의학과) ;
  • 김주일 (국립식량과학원 고령지농업연구센터) ;
  • 김현경 (충북대학교 농업생명환경대학 식물의학과) ;
  • 구현나 (충북대학교 농업생명환경대학 식물의학과) ;
  • 김길하 (충북대학교 농업생명환경대학 식물의학과)
  • Received : 2013.10.30
  • Accepted : 2013.11.29
  • Published : 2013.12.31

Abstract

Susceptibility of each developmental stage of Phthorimaea operculella (Lepidoptera: Gelechiidae) were investigated using 16 insecticides which are available in the market in Korea. For the eggs and pupae, only spinosad showed a 71.1% inhibition rate for egg hatchability and a 66.7% inhibition rate for emergence. For the 3rd instar larvae, the feeding toxicities were over 90% for fenitrothion ($LC_{50}$ 336.6 ppm), esfenvalerate ($LC_{50}$ 8.6 ppm), ethofenprox ($LC_{50}$ 35.7 ppm), and emamectin benzoate ($LC_{50}$ 0.05 ppm). Furthermore, the contact toxicities were over 90% for esfenvalerate ($LC_{50}$ 0.87 ppm), ethofenprox ($LC_{50}$ 16.5 ppm), emamectin benzoate ($LC_{50}$ 0.53 ppm), and spinosad ($LC_{50}$ 2.48 ppm) at the recommended concentrations. Deltamethrin and spinosad yielded 100% mortality for adult P. operculella 48 h after treatment. The adult female fecundity was inhibited by deltamethrin, esfenvalerate, emamectin benzoate, spinosad and dinotefuran, which were significantly different from the control. The adult longevities (7.3-8.3 days) were reduced by approximately 1-2 days compared with the control (9.3 day). The emamectin benzoate maintained 100% insecticidal activity 14 days after treatment and ethofenprox maintained over 90% activity 7 days after treatment.

Acknowledgement

Supported by : 농림수산식품기술기획평가원

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