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http://dx.doi.org/10.5656/KSAE.2009.48.1.101

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

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)
Publication Information
Korean journal of applied entomology / v.48, no.1, 2009 , pp. 101-108 More about this Journal
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.
Keywords
Bacillus thuringiensis; Cnaphalocrocis medinalis; Naranga aenescens; Pesticidal activity; Pupal length;
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Times Cited By KSCI : 3  (Citation Analysis)
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