Composition of essential oil of Chinese Chenopodium ambrosioides and insecticidal activity against maize weevil, Sitophilus zeamais
文献类型： 外文期刊
作者： Chu, Sha Sha 1 ; Hu, Jin Feng 2 ; Liu, Zhi Long 1 ;
作者机构： 1.China Agr Univ, Dept Entomol, Beijing 100094, Peoples R China
2.Fujian Acad Agr Sci, Inst Plant Protect, Fuzhou, Fujian, Peoples R China
关键词： Sitophilus zeamais;Chenopodium ambrosioides;fumigation;contact toxicity;(Z)-ascaridole
期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）
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收录情况： SCI
摘要： BACKGROUND: In a screening programme for new agrochemicals from Chinese medicinal herbs, Chenopodium ambrosioides L. was found to possess strong fumigant activity against the maize weevil Sitophilus zeamais (Motsch.). Essential oil of C. ambrosioides was obtained by hydrodistillation, and the constituents were determined by GC-MS analysis. The active compounds were isolated and identified by bioassay-directed fractionation. RESULTS: Five active compounds [(Z)-ascaridole, 2-carene, ρ-cymene, isoascaridole and α-terpinene] were isolated and identified from the essential oil from Chinese C. ambrosioides. The LC_(50) values (fumigation) of the crude essential oils and the active compound (Z)-ascaridole against S. zeamais adults were 3.08 and 0.84 mg L~(-1) air respectively. The LD_(50) values (contact toxicity) of the crude essential oil and (Z)-ascaridole against S. zeamais adults were 2.12 and 0.86 μg g~(-1) body weight respectively. CONCLUSION: The findings suggested that the essential oil of Chenopodium ambrosioides and its main active constituent, (Z)-ascaridole, may be explored as a natural potential fumigant.
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