Autor(es): Hao, Huiling; Wei, Jianrong; Dai, Jianqing; Du, Jiawei

Resumo: The changes of the host-seeking and blood-feeding behavior of Aedes albopictus (Skuse) (Diptera: Culicidae) surviving in a space containing vapors of the spatial repellents geraniol, eugenol, citral, anisaldehyde, or citronellal were evaluated using an arm-in-cage test and a bioassay of bloodmeals on a shaved mouse. The mosquitoes surviving concentrations of geraniol, citral, eugenol, or anisaldehyde at 0.013, 0.025, 0.050, 0.100, and 0.250 mu g/cm(3) for 24 and 48 h all showed different degrees of reduction in host-seeking ability. After 48 h of exposure to 0.250 mu g/cm(3) geraniol, almost 100% of the mosquitoes lost their host-seeking ability. The next most potent spatial repellent, anisaldehyde, stopped host seeking by >85.5%. Citronellal did not result in a significant reduction in the host-seeking ability at any concentration level after either 24 or 48 h of treatment. We also found that reduction of host-seeking ability recovered after various times. The longest recovery time (144 h) was observed for geraniol after 24 h at 0.250 mu g/cm(3). In the study, geraniol, eugenol, and citral all significantly affected the activation and orientation stages of the blood-feeding behavior. However, only anisaldehyde significantly interrupted the normal blood-feeding of mosquitoes in all stages of behavior. These initial laboratory results clearly showed that anisaidehyde and geraniol could be promising spatial repellents against Ae. albopictus that they could play a major role in new repellent technology.

Palavras-Chave: Aedes Albopictus; Spatial Repellent; Host-Seeking Behavior; Blood-Feeding Behavior

Imprenta: Journal of Medical Entomology, v. 45, n. 3, p. 533-539, 2008

Identificador do objeto digital: 10.1603/0022-2585(2008)45[533:HABBOA]2.0.CO;2

Descritores: Aedes aegypti - Repellent

Data de publicação: 2008

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