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Size, shape and hue modulate attraction and landing responses of the braconid parasitoid Fopius arisanus to fruit odour-baited visual targets

Pérez López, Elsa Jeanneth | Rojas, Julio C [autor/a] | Montoya Gerardo, Pablo Jesús [autor/a] | Liedo Fernández, Pablo [autor/a] | González, Francisco J [autor/a] | Castillo Vera, Alfredo [autor/a].
Tipo de material: Artículo impreso(a) Artículo impreso(a) Tema(s): Moscas de la fruta | Fopius arisanus | ParasitoidesNota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: BioControl. volumen 57, número 3 (Jun 2012), páginas 405-414. --ISSN: 1386- 6141Número de sistema: 34799Resumen:
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Female parasitoids are guided by multisensory information, including chemical and physical cues during host location. In the present study, we investigated the behavioural responses of naïve Fopius arisanus (Sonan) females to visual targets baited with guava odour. In non-choice wind tunnel tests, the attraction and landing responses of parasitoids to spheres painted with different colours, and targets of different shapes and sizes were evaluated. Females were more frequently attracted and landed more often on dark yellow targets than on targets with other colours. There was no correlation between the brightness of each colour and the attraction or landing responses. In contrast, both responses were correlated with relative reflectance (hue) of the coloured targets. A positive correlation was observed between attraction and hue, and a negative correlation between landing and hue. F. arisanus was attracted to and landed more often on spheres than on other shape models. The attraction response of this parasitoid was affected by the size of the targets, with spheres of 10 and 12 cm diameter being more attractive than spheres of 8, 6 and 4 cm diameter. The fact that F. arisanus females were able to discriminate among visual targets that differ in colour, shape and size stresses the importance of vision during host location by this species.
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Female parasitoids are guided by multisensory information, including chemical and physical cues during host location. In the present study, we investigated the behavioural responses of naïve Fopius arisanus (Sonan) females to visual targets baited with guava odour. In non-choice wind tunnel tests, the attraction and landing responses of parasitoids to spheres painted with different colours, and targets of different shapes and sizes were evaluated. Females were more frequently attracted and landed more often on dark yellow targets than on targets with other colours. There was no correlation between the brightness of each colour and the attraction or landing responses. In contrast, both responses were correlated with relative reflectance (hue) of the coloured targets. A positive correlation was observed between attraction and hue, and a negative correlation between landing and hue. F. arisanus was attracted to and landed more often on spheres than on other shape models. The attraction response of this parasitoid was affected by the size of the targets, with spheres of 10 and 12 cm diameter being more attractive than spheres of 8, 6 and 4 cm diameter. The fact that F. arisanus females were able to discriminate among visual targets that differ in colour, shape and size stresses the importance of vision during host location by this species. eng

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