Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3834

Full Length Research Paper

Insecticidal activity of the essential oil of Lonicera japonica flower buds and its main constituent compounds against two grain storage insects

Hai Yan Zhou1, Na Na Zhao2, Shu Shan Du3, Kai Yang2, Cheng Fang Wang3, Zhi Long Liu2 and Yan Jiang Qiao1*
1Beijing University of Chinese Medicine, 11 Beisanhuan East Road, Chaoyang District, Beijing 100102, China. 2Department of Entomology, China Agricultural University, 2 Yuanmingyuan West Road, Haidian District, Beijing 100193, China. 3State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
Email: [email protected]; [email protected]

  •  Accepted: 21 December 2011
  •  Published: 09 February 2012

Abstract

The aim of this research was to determine acute toxicity of the essential oil of Lonicera japonica Thunb. (Caprifoliaceae) flower buds against the booklouse (Liposcelis bostrychophila Badonnel) and the maize weevils (Sitophilus zeamais Motschulsky). Essential oil of L. japonica flower buds was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). A total of 25 components of the essential oil were identified. The principal compounds in the essential oil were estragole (80.17%) and linalool (6.05%). The essential oil exhibited strong contact toxicity against S. zeamais and L. bostrychophila with LD50 values of 21.54 µg/adult and 64.04 µg/cm2, respectively. The constituent compounds, estragole (LD50 = 49.95 µg/cm2) and linalool (LD50 = 172.54 µg/cm2) also possessed contact toxicity against L. bostrychophilaL. japonica essential oil and its constituent compounds (estragole and linalool) exhibited fumigant toxicity against S. zeamaiswith LC50 values of 13.36, 14.10 and 10.46 mg/L, respectively. The essential oil of L. japonica(LC50 = 0.20 mg/L) and its constituent compounds, estragole (LC50 = 0.16 mg/L) and linalool (LC50 = 0.41 mg/L) possessed fumigant toxicity against L. bostrychophila. The results indicated that the essential oil of L. japonica and its constituent compounds showed potential in terms of contact and fumigant toxicity against grain storage insects.

 

Key words: Lonicera japonicaLiposcelis bostrychophilaSitophilus zeamais, contact toxicity, fumigant, essential oil composition, estragole, linalool.