GIFFARD, Brice; DAVID, G.; JOUBARD, B.; PIOU, Dominique; JACTEL, Herve

doi:10.1111/jen.12374

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GIFFARD, Brice

Biodiversité, Gènes & Communautés [BioGeCo]

DAVID, G.
Biodiversité, Gènes & Communautés [BioGeCo]
Institut National de la Recherche Agronomique [INRA]

JOUBARD, B.
Sciences Agro

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Journal of Applied Entomology. 2017, vol. 141, n° 7, p. 551-56

Wiley

Résumé en anglais

Finding the right host plant for feeding and reproduction is crucial for herbivorous insects. Usually they need both visual and olfactory cues to locate and colonize their host plants, but the respective role of the two types of stimuli is difﬁcult to disentangle. Model plants mimicking the shape and colour of natural hosts, combined with odours dispensers, are relevant tools for this purpose. We used dummy pines and cut branches of natural pines to investigate host attraction in Monochamus galloprovincialis, the insect vector of the pine wood nematode in Europe. We compared the behavioural response of males and females, sexually mature or immature, in a large climatic chamber and in an olfactometer. Immature females were signiﬁcantly attracted by the sole odours released by pines. Immature males and mature males and females needed a combination of visualand olfactory cues to ﬁnd the host tree. These ﬁndings suggest that beetles use both visual and chemical cues to locate pine trees but that relevant stimuli likely differ between beetles of different sex and sexual maturation status. Our results question the implementation of precautionary clearcuts around infested trees for limiting the spread of PWN.< Réduire

Mots clés

coleoptera

nématode du pin

monochamus galloprovincialis

comportement

alimentation

maturation sexuelle

repère eulerien

olfactomètre

Mots clés en anglais

beetle

behaviour

cues

foraging

olfactometer

pine wood nematode

chafers

behavior

food intake

sexual maturation

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How do sex and sexual maturation influence the response of Monochamus galloprovincialis to host odours?

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