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1 August 2010 Electroantennographic and Behavioral Responses of Adults of Raspberry Weevil Aegorhinus superciliosus (Coleoptera: Curculionidae) to Odors Released from Conspecific Females
Ana Mutis, Leonardo Parra, Loreto Manosalva, Rubén Palma, Oscar Candia, Marcelo Lizama, Fernando Pardo, Fernando Perich, Andrés Quiroz
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Abstract

The raspberry weevil, Aegorhinus superciliosus (Guérin) (Coleoptera: Curculionidae), is the most important pest in blueberry and raspberry fields in the south of Chile. In this study, we investigated the electroantennographic and behavioral responses of A. superciliosus to semiochemicals released from conspecific individual adults, with particular attention to male attraction to females. Odors released from females significantly attracted males in a Y-tube olfactometer. Gas chromatographic and mass spectral analysis of female volatile extracts revealed the presence of limonene and α-pinene. Electroantennogram recordings from both sexes indicated that males of A. superciliosus possess olfactory sensitivity for the R isomer of limonene and α-pinene, whereas females only perceived R-limonene. Behavioral assays using synthetic compounds showed that only R-limonene elicited an attraction response from male weevils. Field experiments confirmed the laboratory results, showing that R-limonene was attractive to weevils. This is the first report of intraspecific chemical communication in this weevil. We discuss the origin of these compounds, their possible role in the sexual behavior of this species, and their potential use in a pest control strategy.

© 2010 Entomological Society of America
Ana Mutis, Leonardo Parra, Loreto Manosalva, Rubén Palma, Oscar Candia, Marcelo Lizama, Fernando Pardo, Fernando Perich, and Andrés Quiroz "Electroantennographic and Behavioral Responses of Adults of Raspberry Weevil Aegorhinus superciliosus (Coleoptera: Curculionidae) to Odors Released from Conspecific Females," Environmental Entomology 39(4), 1276-1282, (1 August 2010). https://doi.org/10.1603/EN10009
Received: 7 January 2010; Accepted: 29 March 2010; Published: 1 August 2010
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KEYWORDS
Aegorhinus superciliosus
behavioral bioassay
electroantennogram
R-limonene
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