Autor(es): Lucas, J. R.; Shono, Y.; Iwasaki, T.; Ishiwatari, T.; Spero, N.; Benzon, G.

Resumo: Metofluthrin (SumiOne (R)) is a novel, vapor-active pyrethroid that is highly effective against mosquitoes. Laboratory and field trials were conducted in the United States to evaluate the mosquito repellent activity of metofluthrin-treated paper substrates ("emanators"). Initial studies were conducted to evaluate the field performance of 900-cm(2) paper fan emanators impregnated with 160 mg metofluthrin, where Aedes canadensis was the predominant species. Emanators reduced landing rates on human volunteers by between 85% and 100% compared to treated controls. Subsequent tests with 4,000-cm(2) paper strip emanators impregnated with 200 mg metofluthrin were conducted in a wind tunnel as a precursor to conducting field trials using human bait and laboratory-reared Aedes aegypti. Paper strips, which were preaged in a fume hood to determine duration of protection, gave 89-91 % reductions in landing rates compared with controls. Similar reductions in biting activity were also noted. Following these tests, field trials to assess effect on landing rates were conducted with emanators positioned 1.22 m on either side of volunteers protected from biting by Tyvek (R) Suits, With Pre- and post treatment Counts being made. In Florida (predominantly Ochlerotatus spp.) 91-95% reductions were noted 10-30 min after emanators were deployed, while in Washington State (mostly Aedes vexans) 95-97% reductions were observed. These results demonstrate that metofluthrin-treated emanators are highly effective at repelling mosquitoes.

Palavras-Chave: Repellency; Metofluthrin; Ochlerotatus; Aedes; SumiOne (R)

Imprenta: Journal of the American Mosquito Control Association, v. 23, n. 1, p. 47-54, 2007

Identificador do objeto digital: 10.2987/8756-971X(2007)23[47:ULAFTO]2.0.CO;2

Descritores: Aedes aegypti - Repellent ; Aedes aegypti - Public health

Data de publicação: 2007

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