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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.16  supl.2 Curitiba  1999

http://dx.doi.org/10.1590/S0101-81751999000600014 

Resposta de Cosmopolites sordidus (Germar) (Coleoptera, Curculionidae) aos voláteis da planta hospedeira e de adultos coespecíficos em olfatômetro

 

Response of Cosmopolites sordidus (Germar) (Coleoptera, Curculionidae) to host volatiles and conspecific in olfactometer

 

 

Fernando A. C. de MendonçaI; Evaldo F. VilelaII; Álvaro E. EirasIII; Antônio E. G. Sant'AnaIV

IDepartamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-990 Curitiba, Paraná, Brasil
IIDepartamento de Biologia Animal, Universidade Federal de Viçosa, 36571-000, Viçosa, Minas Gerais, Brasil
IIIDepartamento de Parasitologia, Universidade Federal de Minas Gerais. Belo Horizonte, Minas Gerais, Brasil
IVLaboratório de Pesquisa em Recursos Naturais, Universidade Federal de Alagoas. Rodovia BR 101, Tabuleiro dos Martins, 57072-970, Maceió, Alagoas, Brasil

 

 


ABSTRACT

The response of Cosmopolites sordidus (Germar, 1824) to the volatiles of its host banana plant (Musa paradisiaca cv. Prata) and conspecific adults was studied. In olfactometer, the attraction of males and females of C. sordidus to rhizome and pseudotem of the banana, fresh or rotting, was observed. The results suggested that the aggregation pheromone is produced by males and that it attracts both sexes, and that there is another pheromone produced by females which attracts males only. The results also suggest that the females are the first responsible for the aggregation of the species, but the male pheromone is mainly responsible for the mass aggregation. Nevertheless, the aggregation phenomenon is a consequence of the mutual action of both pheromones plus the kairomones produced by the banana plant.

Key words: Cosmopolites sordidus, Banana weevil, agregation pheromone, kairomone, olfactometer.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

AGRADECIMENTOS. Os autores agradecem às Professoras Terezinha M.C. Della-Lucia (Departamento de Biologia Animal, UFV) e Lúcia M. de Almeida (Departamento de Zoologia, UFPR) pelas sugestões e críticas apresentadas na elaboração do manuscrito.

 

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Recebido em 29.I.1999; aceito em 17.XI.1999.

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