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RELATIONS PLANTE-INSECTES ET INSECTES-INSECTES CHEZ LE CHARANCON DES AGRUMES Diaprepes abbreviatus L (COLEOPTERA : CURCULIONIDAE)

Author

Listed:
  • Pavis, C.

Abstract

Aux Antilles françaises, un grave problème de dépérissement en agrumiculÎure est apparu seulement quelques années après la plantation des premiers vergers. Un ravageur est en partie responsable de ce phénomène, le charançon Diaprepes abbreviatus dont les larves attaquent le système racinaire. Une technique d'olfactométrie a été mise au point pour quantifier les réponses comportementales des adultes de Diaprepes abbreviatus (Coleoptera : Curculionidae) aux odeurs produites par les insectes, par leurs excréments (frass) et par les jeunes feuillages de citrus dont ils se nourrissent. Le rôle et l'utilisation potentielle en lutte intégrée des différentes substances sémiochimiques mises en jeu sont discutés. ----- Diaprepes abbreviatus, commonly known as the «rootstalk borer weevil» is an important pest of citrus and Sugarcane in the Caribbean basin. In the citrus groves, larvae feed on the roots, causing serious injury to the hostplant (decline and death of the tree when attacks are important). Integrated management of this pest implies behavioral studies. Weevilproduced attractant could supply a method for detecting weevil populations or for controlling them. In the present study, an olfactometer has been developped to analyse the relationships between host-plant and insects and between insects themselves. We quantified the biological responses of the insects to olfactory stimulus such as insects, frass and citrus foliage. The biological activity of the semiochemicals implied is discussed.

Suggested Citation

  • Pavis, C., 1989. "RELATIONS PLANTE-INSECTES ET INSECTES-INSECTES CHEZ LE CHARANCON DES AGRUMES Diaprepes abbreviatus L (COLEOPTERA : CURCULIONIDAE)," 25th Annual Meeting, July 1-6, 1989, Gosier, Guadeloupe 259915, Caribbean Food Crops Society.
    • Handle: RePEc:ags:cfcs89:259915
    DOI: 10.22004/ag.econ.259915
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