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journal1 ›› 2018, Vol. 34 ›› Issue (3): 364-369.DOI: 10.16409/j.cnki.2095-039x.2018.03.002

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Chimecal Composition, Insecticidal and Repellent Activities of Essential Oils from Two Chamaecyparis Species against Mosquitoes

PENG Yinghui1, ZHAO Helu1, XIONG Guohong2, FU Qiaomei1, LIU Min1, JIANG Lijuan1, LI Jilie1   

  1. 1. College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China;
    2. National Household Insecticide Products Quality Supervision and Inspection Center, Yiyang 413000, China
  • Received:2017-10-13 Online:2018-06-08 Published:2018-06-14

Abstract: The insecticidal potential of the essential oils from Chamaecyparis pisifera and Chamaecyparis obtuse were tested against the 4th instar larvae and pupae of Aedes albopictus and Culex pipiens quinquefasciatus using the immersion method. The repellent activity of the essential oils against adults of A. albopictus was assayed by topical application on the skin. The compositions of essential oils were qualitatively analyzed using gas chromatography-mass spectrometry. The 24 h LC50 values of C. pisifera and C. obtuse oil against the 4th instar larvae/pupae of A. albopictus were 47.66/152.33 and 73.11/205.06 μg/mL, respectively, while for C. p. quinquefasciatus the values were 31.74/107.61 and 63.94/131.42 μg/mL, respectively. The protection period offered by C. pisifera and C. obtuse oil against A. albopictus were 3.24 h and 0.78 h, 5.45 h and 1.86 h at concentration of 1.5, 2.0 μL/cm2, respectively. A total of 16 compounds were identified from C. pisifera oil, including α-pinene (29.89%), 17-norkaur-15-ene (9.96%), Δ-3-carene (9.79%). And 22 compounds were identified in C. obtuse oil, the main components were Δ-3-carene (35.33%), α-pinene (25.60%), β-myrcene (12.86%). The essential oils of C. pisifera and C. obtuse showed high larvicidal and pupicidal activity against the 4th instar larvae and pupae of A. albopictus and C. p. quinquefasciatus, and C. pisifera oil also had excellent repellent activity against A. albopictus. The results suggest that C. pisifera oil and C. obtuse oil could be exploited as potential eco-friendly mosquito control agents.

Key words: Chamaecyparis pisifera, Chamaecyparis obtuse, essential oil, mosquitoes, insecticidal activity, repellent activity

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