Contact Activity of Root Extracts from Macleaya cordata against Tenhrio motlitorlin（L.）

• 作者: WU Bao.yue WU Shan-shan YU Quan-fin ZHANG Min ZHOU Nong-lin
• 来源期刊: 植物病虫害研究：英文版
• 学科: 农学
• 关键词: 植物病虫害 预防 植物保护 植物检疫
• 年，卷（期）: 2012,（1）
• 页码范围: 42-44
• 页数: 3页
• 分类号: S4

摘要

[Objective] The study was to screen the active part from roots of Macleaya cordata. [Method] Dipping method was used to study the contact activity of ethanol extract and 4 kinds of extracts by petroleum, ethyl acetate, n-butanol and water from the root of M. cordata on 2nd and 6th instars larvae of T. motlitorlin(L.). [Result] The corrected mortality rate of T. motlitorlin increased with the increase of extract concentration. When the concentration was 100 mg/ml, the contact activity of ethyl acetate extract against 2nd instar larvae of T. motlitorlin was the highest, the corrected mortality rate at 48 h reached 80.95%, and LC50 was 65.532 9 mg/ml. The overall performance of insecticidal activity was as follows: ethyl acetate layer > petroleum layer = n-butanol layer > total extracts (ethanol) > water layer. The contact toxicity of ethanol extract and petroleum extract against 6th instar larvae of T. motlitorlin was the highest, and the corrected mortality rate at 48 h reached 71.42% and 66.67%, LC50 were 83.899 8 and 86.687 7 mg/ml, respectively. The overall performance of insecticidal activity was as follows: total extracts (ethanol) > petroleum layer > ethyl acetate layer > n-butanol layer > water layer. [Conclusion] The insecticidal active components of M. cordata root were distributed within the polarity range of petroleum and ethyl acetate, and the part could be further separated and identified.