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题名: Insecticidal compounds from Tripterygium wilfordii active against Mythimna separata
作者: Luo, DQ; Zhang, X; Tian, X; Liu, JK
刊名: ZEITSCHRIFT FUR NATURFORSCHUNG C-A JOURNAL OF BIOSCIENCES
关键词: Tripterygium wilfordii ; insecticidal compounds ; Mythimna separata
英文摘要: In the course of screening for novel naturally occurring insecticides from plants, the ethanol extract of the root bark of Tripterygium wilfordii Hook f. was found to show insecticidal activity against larvae of Mythimna separata Walker. Three active compounds were isolated by bioassay-guided fractionation of the extract and characterized as triptolide (1), triptonide (2) and euonine (3) by IR, H-1 and C-13 NMR and mass spectral analysis. Compounds 1 and 2 showed strong contact activity against 3(rd) or 5(th) larvae of M. separata (LD50 1.6 mug/insect for 1, 2.9 mug/insect for 2, no contact activity for 3; LD50 is the lethal dose for 50% mortality). The antifeedant activity against the 3(rd) larvae of M. separata after a 24-h treatment was demonstrated; 1, 2 and 3 gave EC50 (effective concentration causing 50% antifeedance) values of 0.25, 0.35 and 0.02 mm, respectively. 1 and 2 were inferior to the positive control represented by toosendanin (12alpha-acetoxyamoorastatin), 3 was superior to toosendanin. For the ingested toxicity against M. separata, 1 had the more potent activity with an KD50 value of 13.5 mug/g (insect body weight) than toosendanin. This is the first report on insecticidal activity of these three compounds.
出版日期: 2004-05-01
卷号: 59, 期号:5-6, 页码:421-426
语种: 英语
ISSN号: 0939-5075
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/14455
Appears in Collections:植物化学与西部植物资源持续利用国家重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
2.NW Sci Tech Univ Agr & Forestry, Pesticide Res Ctr, Yangling 712100, Shaanxi, Peoples R China
3.Lanzhou Univ, Natl Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China

Recommended Citation:
Luo, DQ; Zhang, X; Tian, X; Liu, JK.Insecticidal compounds from Tripterygium wilfordii active against Mythimna separata,ZEITSCHRIFT FUR NATURFORSCHUNG C-A JOURNAL OF BIOSCIENCES,2004,59(5-6):421-426
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