Larvicidal activity of Vietnamese Solanum nigrum on mosquitoes Aedes aegypti and Aedes albopictus (Diptera: Culicidae)

  • T.D.H. Dinh Department of Fundamental Medicine, Hai Duong Medical Technical University, Viet Nam.
  • Q.T. Le | tuanisation@gmail.com Department of Parasitology and Entomology, Vietnam Military Medical University, Hanoi, Viet Nam.
  • T.D. Nguyen Department of Parasitology, Thai Binh University of Medicine and Pharmacy, Viet Nam.
  • T.Q.T. Nguyen Department of Parasitology, Thai Nguyen University of Medicine and Pharmacy, Viet Nam.
  • A.S. Ho Institute of Biomedicine and Pharmacy, Vietnam Military Medical University, Viet Nam.
  • V.B. Nguyen Oncology Center, Military Hospital 103, Vietnam Military Medical University, Viet Nam.
  • T.V. Nguyen Department of Parasitology and Entomology, Vietnam Military Medical University, Hanoi, Viet Nam.
  • T.H. Hoang Department of Microbiology, Nam Dinh University of Nursing, Viet Nam.
  • V.D. Nguyen Department of Entomology, National Institute of Malariology, Parasitology and Entomology, Hanoi, Viet Nam.
  • K.L. Nguyen Department of Parasitology and Entomology, Vietnam Military Medical University, Hanoi, Viet Nam.

Abstract

A Vietnamese domestic plant namely Solanum nigrum (S. nigrum) was subjected to test for larvicidal activity on two majors Dengue hemorrhagic fever (DHF) vectors Aedes aegypti (Ae. aegypti) and Aedes albopictus (Ae. albopictus). The plant was processed to get infusions in hot water or extracted in ethanol. Laboratory and field larval strains of two Aedes species were exposed to the infusions and extract at increasing concentrations for one hour and followed-up intensively for up to 72 hours. The obtained results of bioassay showed larvicidal effects of extract on all mosquito strains. The effects on laboratory strain of Ae. aegypti larvae were correlated with infusions and extract concentrations. Chopped plant infusions in hot water indicated mortality up to 77.3% of larvae. Ground plant infusions killed all of exposed larvae at day 3 postexposure. Median lethal concentrations (LC50,s) of chopped and ground plant infusions were 10.25 and 7.54%, respectively. Ethanolic extract had very strong effect on experimental subjects. Within 72 hours, 100% of laboratory strain of Ae. aegypti larvae died after exposure to extract at 100 parts per million (ppm) or higher concentrations. Ethanolic plant extract showed similar larvicidal effect on field strains of Ae. aegypti and Ae. albopictus. The percentage mortality of field strains larvae reached 100% after exposure to 100 ppm of plant extract. At concentrations of 1000 ppm, 100% of exposed larvae died with 8 hours. LC50 on tested larvae was 25.07-33.60 ppm. Strong larvicidal activity of S. nigrum suggests the possible application in DHF vector control effort.

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Published
2020-05-29
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Section
Entomology
Keywords:
Solanum nigrum, larvicidal, Aedes aegypti, Aedes albopictus, infusion, extract
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How to Cite
Dinh, T., Le, Q., Nguyen, T., Nguyen, T., Ho, A., Nguyen, V., Nguyen, T., Hoang, T., Nguyen, V., & Nguyen, K. (2020). Larvicidal activity of Vietnamese <em>Solanum nigrum</em> on mosquitoes <em>Aedes aegypti</em> and <em>Aedes albopictus</em&gt; (Diptera: Culicidae). Journal of Entomological and Acarological Research, 52(1). https://doi.org/10.4081/jear.2020.8866