The toxicity of an IGR class insecticide, Diflubenzuron on silkworm, Bombyx mori and abnormal symptoms

IGR계 농약 diflubenzuron의 독성과 누에이상증상

  • Park, Kyung-Hun (Department of Crop Life Safety, National Institute of Agricultural Science and Technology(NIAST), Rural Development Administration(RDA)) ;
  • Kim, Byung-Seok (Department of Crop Life Safety, National Institute of Agricultural Science and Technology(NIAST), Rural Development Administration(RDA)) ;
  • Park, Yeon-Ki (Department of Crop Life Safety, National Institute of Agricultural Science and Technology(NIAST), Rural Development Administration(RDA)) ;
  • Lee, Hee-Dong (Department of Crop Life Safety, National Institute of Agricultural Science and Technology(NIAST), Rural Development Administration(RDA)) ;
  • Jeong, Mi-Hye (Department of Crop Life Safety, National Institute of Agricultural Science and Technology(NIAST), Rural Development Administration(RDA)) ;
  • You, Are-Sun (Department of Crop Life Safety, National Institute of Agricultural Science and Technology(NIAST), Rural Development Administration(RDA)) ;
  • Sohn, Bong-Hee (Department of Agricultural Biology, NIAST, RDA) ;
  • Kang, Pil-Don (Department of Agricultural Biology, NIAST, RDA)
  • 박경훈 (농촌진흥청 농업과학기술원 농산물안전성부) ;
  • 김병석 (농촌진흥청 농업과학기술원 농산물안전성부) ;
  • 박연기 (농촌진흥청 농업과학기술원 농산물안전성부) ;
  • 이희동 (농촌진흥청 농업과학기술원 농산물안전성부) ;
  • 정미혜 (농촌진흥청 농업과학기술원 농산물안전성부) ;
  • 유아선 (농촌진흥청 농업과학기술원 농산물안전성부) ;
  • 손봉희 (농촌진흥청 농업과학기술원 농업생물부) ;
  • 강필돈 (농촌진흥청 농업과학기술원 농업생물부)
  • Published : 2007.12.30

Abstract

Surveying, laboratory and field trial were performed to elucidate the causes of non-spinning syndrome of silkworm, Bombyx mori, abnormal symptoms of silkworm instars observed in certain sericultural fanning region. Mortality and growth of silkworm was still influenced by feeding the mulberry leaves sprayed with 10,000 fold diluted solution of standard spray of diflubenzuron WP (25%). Mortality and growth of silkworm fed with diflubenzuron-sprayed mulberry leaves with recommended spray solution were entirely affected even six weeks after spraying irrespective to the instars. Larval period of 5th instar and cocooning duration of silkworm was not affected in case 50m of buffer zone has maintained in near-by orchard field sprayed with diflubenzuron WP (25%). However, survival rate of pupae was not influenced in case 100 m of buffer zone has kept. Insect growth regulating insecticides were required to keep a certain distance of buffer zone when sprayed with water-diluted solution, 100 m from the application site at least in order to prevent contamination of the spraying drift by the chemicals.

Keywords

non-spinning syndrome of silkworm;diflubenzuron;survival rate;buffer zone

References

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