Field study of the attractant and repellent potential of volatile organic compounds for the coffee berry borer

Dufour Bernard Pierre, Etienne Laetitia, Ribeyre Fabienne, Avelino Jacques. 2013. Field study of the attractant and repellent potential of volatile organic compounds for the coffee berry borer. In : Proceedings of the 24th International Conference on Coffee Science, San José, Costa Rica, 12th-16th November 2012 = Actes du 24ème Colloque scientifique international sur le café, San José, Costa Rica, 12-16 novembre 2012. ASIC. Paris : ASIC, 922-926. ISBN 978-2-900212-23-3 International Conference on Coffee Science. 24, San José, Costa Rica, 12 Novembre 2012/16 Novembre 2012.

Note générale : Diaporama n°B8 accessible sur internet : http://asic2012costarica.org/download/presentations/3-wednesday.zip

Résumé : Chemical analysis of effluvia emitted by coffee berries reveals the existence of numerous volatile organic compounds that are attractive to the coffee berry borer (CBB) Hypothenemus hampei Ferrari, and which are poorly understood. Only ethanol and methanol have a clearly demonstrated attractant potential when mixed; they are widely used as bait to trap this pest. Methylcyclohexane, ethylbenzene, nonane, octen-3-ol, phenylethanol, trans-2-hexenal and benzaldehyde induce an electrophysiological reaction and/or a positive olfactometric response in the CBB. Camphene and ?-pinene show a repellent effect for the CBB when widely released and cis-3-hexenol and 1-hexanol disrupt attraction of the pine shoot beetle. These compounds were tested under field conditions, in order to confirm their attractant or repellent potential. The seven potentially attractive compounds were tested separately with BROCAP® traps in the field, in association or not with a blend of ethanol and methanol. The compounds tested alone did not attract significantly more than water; associated with a blend of ethanol and methanol, they did not attract significantly more than ethanol-methanol alone. The four compounds selected for their repellent properties were tested in combination with a blend of ethanol and methanol, under the same field experiment conditions. We demonstrated that the repellent action of cis-3-hexenol and 1-hexanol was significant. The results of field trials with the assumed attractive volatile organic compounds disagreed with those obtained under laboratory conditions, according to the literature. In addition, compounds whose repellent properties are confirmed offer the possibility of integrating them in pull-push experiments.

Classification Agris : H20 - Maladies des plantes

Auteurs et affiliations

• Dufour Bernard Pierre, CIRAD-BIOS-UPR Bioagresseurs (FRA)
• Etienne Laetitia, Montpellier SupAgro (FRA)
• Ribeyre Fabienne, CIRAD-BIOS-UPR Bioagresseurs (FRA)
• Avelino Jacques, CIRAD-BIOS-UPR Bioagresseurs (CRI) ORCID: 0000-0003-1983-9431

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570873/)

Métriques

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