Sensory response of the egg parasitoid Telenomus podisi to stimuli from the bug Euschistus heros

Pesquisa Agropecuária Brasileira

Cleonor Cavalcante Silva¹  Maria Carolina Blassioli Moraes¹  Raúl Alberto Laumann¹  Miguel Borges¹ 

[1] ,Embrapa Recursos Genéticos e Biotecnologia Parque Estação Biológica Brasília DF ,Brazil

关键词: forage behavior;    sex pheromone;    olfactory response;    combination of stimuli;    comportamento de busca;    feromônio sexual;    resposta olfativa;    combinação de estímulos;   

DOI  :  10.1590/S0100-204X2006000700004

来源: SciELO

【 摘 要 】

The objective of this work was to study the foraging behavior of Telenomus podisi Ashmead (Hymenoptera: Scelionidae) in the presence of stimuli from its host, Euschistus heros (Heteroptera: Pentatomidae). The stimuli selected were: egg mass; virgin males and females; volatile extracts of sexually mature males and females; components of male sex pheromone; a component of the alarm pheromone, hexane and an empty cage as control. In a closed arena, the parasitoids were given the choice between single and combined stimuli presented to them simultaneously. To find the host egg, T. podisi primarily uses the sensory cues released from the male insects. The orientation toward odors of male chemical extract indicates that a source of kairomone was detected. Gas chromatographic analyses of this substance showed peak of methyl 2,6,10-trimethyltridecanoate, the main component of male sexual pheromone. The sensory response to methyl 2,6,10-trimethyltridecanoate confirms that this compound may act as a kairomone to find host eggs. Females and egg mass stimuli were weakly attractive to the parasitoid.

【 授权许可】

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