title: Effect of Olyset Net on Mosquito Larvae and Their Heteroptera Predators in Water Jars in Southern Vietnam.
abstract: Residents of Vietnam living in areas with water shortages collect and store tap water, when it is available, in containers, such as jars, which is then used for their daily activities. Although these water jars are important breeding sites for mosquitoes, Vietnam legislation prohibits the use of chemical larvicides in such containers. The effect of Olyset Net on the abundance of mosquito larvae and their Heteroptera predators (Micronecta spp. and Veliidae) in jars was evaluated via field experiments conducted in Tan Chanh, Long An, Vietnam. The number of Aedes larvae decreased when the jars were covered with the Olyset Net, while the numbers of non-Aedes mosquito larvae (Culex and Anopheles), and those of Micronecta and Veliidae, did not vary until the end of the experiment. However, Micronecta population increased after removing the Olyset Net from the jars, and consequently Aedes larvae decreased due to these changes in the Micronecta, 26 days after the Olyset Net was removed. Incomplete use of Olyset Net failed to control mosquitoes in water jars based on the invasion of adult mosquitoes, and in water transferred by residents among the jars, which might contain larvae. These results suggest that Micronecta, as well as Olyset Net, can be considered as control agents for mosquito larvae.
authors.affiliation: Department of Vector Ecology & Environment, Institute of Tropical Medicine, Nagasaki University.
authors.forename: Shin-Ya
authors.initials: SY
authors.lastname: Ohba
authors.forename: Trang T
authors.initials: TT
authors.lastname: Huynh
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kawada
authors.forename: Loan Luu
authors.initials: LL
authors.lastname: Le
authors.forename: Huu Tran
authors.initials: HT
authors.lastname: Ngoc
authors.forename: San Le
authors.initials: SL
authors.lastname: Hoang
authors.forename: Masahiro
authors.initials: M
authors.lastname: Takagi
mesh_terms: D000330:Aedes / Q000502:physiology*; D000818:Animals; D000852:Anopheles / Q000502:physiology*; D061046:Biological Control Agents; D003465:Culex / Q000502:physiology*; D020062:Heteroptera / Q000502:physiology*; D006801:Humans; D057148:Insecticide-Treated Bednets; D007306:Insecticides; D007814:Larva / Q000254:growth & development; D009032:Mosquito Control / Q000379:methods; D026023:Permethrin; D011157:Population Dynamics / Q000706:statistics & numerical data; D014867:Water / Q000469:parasitology; D014881:Water Supply
chemical_list: D061046:Biological Control Agents; D007306:Insecticides; D014867:Water; D026023:Permethrin