Medical Entomology and Zoology (2003) 54, 31-36

Shinji Kasai, Minoru Mihara, Masakazu Takahashi, Noriaki Agui and Takashi Tomita (2003)
Rapid evaluation of human louse susceptibility to phenothrin
Medical Entomology and Zoology 54 (1), 31-36
Abstract: In order to establish a simplified method of evaluating the insecticide susceptibility of the human louse, we examined the time-course knockdown of body lice (Pediculus humanus) to phenothrin, the only registered active pyrethroid ingredient of a pediculicide in Japan. Using an insecticide susceptible strain of the body louse (NIID strain), the knockdown effect of phenothrin was assessed at 1, 2, 3, 4, 18 and 24 h after the treatment by means of a continuous filter paper-contact method. The median knockdown concentration (KC₅₀) at 3 h was 31 mg/m² and that at 24 h was 33 mg/m², showing the rapid acute-toxicity of phenothrin. Thus it was suggested that 24 h observation is not necessarily needed to evaluate the insecticidal activity of phenothrin to the body lice.
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Database assignments for author(s): Shinji Kasai, Takashi Tomita

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Pediculus humanus		Japan