Journal of Tropical Diseases and Parasitology ›› 2024, Vol. 22 ›› Issue (2): 97-101.doi: 10.3969/j.issn.1672-2302.2024.02.006

• TOPICS ON VECTOR-BORNE DISEASES • Previous Articles     Next Articles

Bioactivity screening and component analysis of highly active plant essential oil against Culex pipiens pallens

LEI Jingjing1(), LI Yaping2, LOU Ziwei1, ZANG Chuanhui1, CHENG Peng1, GONG Maoqing1, LIU Lijuan1()   

  1. 1. Shandong Institute of Parasitic Diseases; Shandong First Medical University (Shandong Academy of Medical Sciences), Jining 272033, Shandong Province, China
    2. Agricultural Bureau of Jinxiang County
  • Received:2023-07-06 Online:2024-04-20 Published:2024-04-30
  • Contact: LIU Lijuan, E-mail: liulijuan@sdfmu.edu.cn

Abstract:

Objective To screen a plant essential oil with high biological activity against both larvae and adults of Culex pipiens pallens to obtain essential oil component with biological activity against Cx. pipiens pallens. Methods The insecticidal activity of 19 kinds of plant essential oil against Cx. pipiens pallens larvae was determined by liquid culture method, the fumigation activity to female adult mosquitoes of essential oil with 24-hour mortality over 50.00% in larval toxicity test was determined by closed triangular flask fumigation method. Then the essential oil with high activity against both larva and adult mosquitoes was analyzed by gas chromatography-mass spectrometry (GC-MS). Results The essential oil extracted from Allium fistulosum and Lantana camara had good activity against the third instar larvae of Cx. pipiens pallens. At the test concentration of 80 μg/mL, the mortality rate of mosquito larvae within 24 h reached as high as 100.00%. The activity of Cyperus rotundus, Santalum album, Cinnamomum cassia and Cedrus deodara essential oil ranked the second on the candidate list, leading to the 24 h mortality rates of mosquito larvae being 91.67%, 91.67%, 88.33% and 83.33%, respectively. Fumigation test for the mosquitos using the 6 essential candidates described above revealed that the fumigation activity of A. fistulosum, Ce. deodara and Cy. rotundus was better, with median knockdown time (KT50) values being 5.31 min, 8.60 min and 9.49 min, respectively. GC-MS analysis was conducted on the components of A. fistulosum, Ce. deodara and Cy. rotundus, which had high activity against larvae and adult mosquitoes. The results showed that 32, 62 and 48 components were identified in A. fistulosum, Cy. rotundus and Ce. deodara essential oil, respectively. The extracted essential oil components were composed of hydrocarbons, alcohols, aldehydes, amines, ketones, acids, phenols, ester and other compounds. Conclusion The essential oil of Allium fistulosum, Cy. rotundus and Ce. deodara is potential value in control of vector mosquitoes, because it possesses high toxic activity against both larvae and adults of Cx. pipiens pallens.

Key words: Essential oil, Culex pipiens pallens, Toxic activity, Fumigation activity, Component analysis

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