Water hyacinth (Eichhornia crassipes) as an indicator to show the absence of Anopheles sundaicus larvae

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  • KIKUCHI Tetsushi
    North Sumatra Health Promotion Project, Japan International Cooperation Agency:Department of Medical Zoology, Teikyo University School of Medicine
  • TAKAGI Masahiro
    North Sumatra Health Promotion Project, Japan International Cooperation Agency:Department of Medical Entomology, Institute of Tropical Medicine, Nagasaki University
  • TOKUHISA Eiji
    North Sumatra Health Promotion Project, Japan International Cooperation Agency:Teiso Kasei Co., Ltd.
  • SUZUKI Takeshi
    North Sumatra Health Promotion Project, Japan International Cooperation Agency
  • PANJAITAN William
    Provincial Health Service of North Sumatra, Jalan Prof.
  • YASUNO Masayuki
    North Sumatra Health Promotion Project, Japan International Cooperation Agency:Department of Ecosystem Studies, The University of Shiga Prefecture School of Environmental Science

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  • Anopheles sundaicus 幼虫生息場所の環境指標としてのホテイアオイの有用性について
  • Water hyacinth Eichhornia crassipes as

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Abstract

Water hyacinth, Eichhornia crassipes, was evaluated as to whether its appearance could be useful as an indicator to show the absence of Anopheles sundaicus larvae in the coastal area of the Asahan Province in North Sumatra, Indonesia. The water hyacinth was distributed along the coast in water bodies in which salinity was less than 0.2%. No An. sundaicus larva was found breeding in waters with hyacinths. In waters without any macrophyte vegetation, the larvae were frequently found in the range of 0.0% to 4.0% salinity. The susceptibility test revealed that the plant could not tolerate 0.32% salinity and began withering, but they were thriving at 0.24% salinity or less after 2 days exposure. It was concluded that the water hyacinth is a suitable plant for the detecting of An. sundaicus larval habitats and/or brackish water bodies in coastal flats.

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