title: Physical influence on larvicidal and pupicidal activity of the silicone-based monomolecular film.
abstract: Although silicone-based monomolecular film (MMF) has been accepted as larvicide in several countries, its mosquito control potential has never been investigated in Thailand. Laboratory assessment in this study was conducted to determine the MMF efficacy against Aedes aegypti. At the recommended dosage (1mL/m(2) of water surface), mortality of pupae (99.17±0.83%) was significantly greater than mortality of old and young larvae (73.33±9.13, 11.67±3.47%; respectively). Pupicidal activity was rapidly exhibited within hours while larvicidal activity took at least one day. Interestingly, among the survived mosquitoes after MMF exposure, larval length (3.6±0.18mm), pupation (0%) and adult emergence (0%) were significantly less than the control group. Gravid females also avoided laying eggs in MMF-treated oviposition cups. There was no influence of physical factors on MMF efficacy and no toxic effects on fish and plants. These results indicated the MMF is promising to provide not only larvicidal and pupicidal activity but also inhibition of larval development as indicated by both larval length and stage transformation.
authors.affiliation: Department of Community Medical Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand. Electronic address: warunee.ngr@mahidol.ac.th.
authors.forename: Warunee
authors.initials: W
authors.lastname: Ngrenngarmlert
authors.affiliation: Department of Community Medical Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand. Electronic address: c.sukkanon@gmail.com.
authors.forename: Chutipong
authors.initials: C
authors.lastname: Sukkanon
authors.affiliation: Department of Community Medical Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand. Electronic address: rapeeporn.yai@mahidol.ac.th.
authors.forename: Rapeeporn
authors.initials: R
authors.lastname: Yaicharoen
authors.affiliation: Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand. Electronic address: faasthc@ku.ac.th.
authors.forename: Theeraphap
authors.initials: T
authors.lastname: Chareonviriyaphap
mesh_terms: D000330:Aedes / Q000187:drug effects* / Q000254:growth & development; D000818:Animals; D005260:Female; D007306:Insecticides / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects; D009032:Mosquito Control / Q000379:methods*; D010058:Oviposition / Q000187:drug effects; D011679:Pupa / Q000187:drug effects; D012828:Silicones; D013785:Thailand
chemical_list: D007306:Insecticides; D012828:Silicones
keywords: Aedes aegypti; Monomolecular film; Mosquito control