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Host location behaviour by two Cephalonomia spp. (Hymenoptera: Bethylidae) wasps associated with the coffee berry borer Hypothenemus hampei (Coleoptera: Curculionidae: Scolytinae)

Published online by Cambridge University Press:  01 December 2008

Pilar Chiu-Alvarado
Affiliation:
Departamento de Entomología Tropical, El Colegio de la Frontera Sur (ECOSUR), Apdo Postal 36, Tapachula, Chiapas30700, Mexico Department of Zoology, Oxford University, South Park Road, OxfordOX1 3PS, UK
Julio C. Rojas*
Affiliation:
Departamento de Entomología Tropical, El Colegio de la Frontera Sur (ECOSUR), Apdo Postal 36, Tapachula, Chiapas30700, Mexico
*
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Abstract

The host location behaviour of two closely related bethylid parasitoids was investigated under laboratory conditions. Although both species of parasitoid attack the coffee berry borer (CBB) Hypothenemus hampei Ferrari, they differ in their diet breadth. In Y-tube olfactometer bioassays, we investigated the behavioural responses of Cephalonomia stephanoderis (Betrem), a parasitoid with a narrower diet breadth, and Cephalonomia hyalinipennis (Ashmead), a parasitoid with a wider diet breadth, to the coffee–CBB complex volatiles. The results revealed that the responses differed for the two species. In single- and dual-choice tests, C. stephanoderis was attracted to volatiles emitted by CBB-infested coffee berries, dust/frass and CBB immature stages, whereas C. hyalinipennis was not attracted to any cues from plant–host complex offered.

Type
Research Paper
Copyright
Copyright © ICIPE 2009

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