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Pesticidal Activities and Effect on Its Biological Characteristics of Bacillus thuringiensis Strains from Soil against Rice Pests, Cnaphalocrosis medinalis and Maranga aenescens

토양에서 분리한 곤충병원성세균 Bacillus thuringiensis 의 혹명나방과 벼애나방에 대한 실내살충효과검정 및 생물학적 특성에 미치는 영향

  • Seo, Mi-Ja (Reclaimed Land Agriculture Research Division, Dept. Rice and Winter Cereal Crop) ;
  • Paik, Chae-Hoon (Reclaimed Land Agriculture Research Division, Dept. Rice and Winter Cereal Crop) ;
  • Kang, Mi-Hyung (Reclaimed Land Agriculture Research Division, Dept. Rice and Winter Cereal Crop) ;
  • Lee, Geon-Hwi (Reclaimed Land Agriculture Research Division, Dept. Rice and Winter Cereal Crop) ;
  • Lee, Du-Ku (Reclaimed Land Agriculture Research Division, Dept. Rice and Winter Cereal Crop) ;
  • Lee, Kyu-Seong (Reclaimed Land Agriculture Research Division, Dept. Rice and Winter Cereal Crop) ;
  • Youn, Young-Nam (Dept. Applied biology, College of agriculture and life sciences, Chungnam National University) ;
  • Yu, Yong-Man (Dept. Applied biology, College of agriculture and life sciences, Chungnam National University)
  • 서미자 (국립식량과학원 벼맥류부 간척지농업과) ;
  • 백채훈 (국립식량과학원 벼맥류부 간척지농업과) ;
  • 강미형 (국립식량과학원 벼맥류부 간척지농업과) ;
  • 이건휘 (국립식량과학원 벼맥류부 간척지농업과) ;
  • 이두구 (국립식량과학원 벼맥류부 간척지농업과) ;
  • 이규성 (국립식량과학원 벼맥류부 간척지농업과) ;
  • 윤영남 (충남대학교 농업생명과학대학 응용생물학과) ;
  • 유용만 (충남대학교 농업생명과학대학 응용생물학과)
  • Published : 2009.03.30

Abstract

For biological control of larva of Cnaphalocrocis medinalis and Naranga aenescens do considerable damage to crops by folding and scraping the leaf tissue of rice, a large number of Bacillus thuringiensis isolates have been obtained from soil samples in Korea and the pesticidal activity was assayed against two insect pest species described above. Among 53 Bt isolates tested in bioassay, 18 and 13 isolates showed over 90% mortality against C. medinalis and N. aenescens, respectively. Some isolates (11 isolates including CAB141) presented dual activity against C. medinalis and N. aenescens. These isolates showed over 96% control effect in pest control in laboratory against larvae of C. medinalis. Also, it was investigated that pupation, pupal length, and adult emergence of larvae exposed to Bt suspension decreased. Especially, the pupal length of C. medinalis after being fed corn seedling leaves treated Bt suspension for 10 days, were much smaller than that of control.

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  1. The Occurrence of Rice Leaf-folder, Cnaphalocrocis medinalis (Lepidoptera : Crambidae) in Suwon and its Responses to Insecticides vol.49, pp.3, 2010, https://doi.org/10.5656/KSAE.2010.49.3.219