Allomonal effects of ripe coffee berries odors in antestia bugs, Antestiopsis thunbergii (Heteroptera: Pentatomidae): Implication for the pest management

Njihia Teresiah, Torto Baldwin, Murungi Lucy Kananu, Irungu Janet, Mwenda Dickson, Babin Régis. 2017. Allomonal effects of ripe coffee berries odors in antestia bugs, Antestiopsis thunbergii (Heteroptera: Pentatomidae): Implication for the pest management. In : Livre des résumés de la 22ème Réunion et Conférence de l’Association Africaine des Entomologistes : “Vers une amélioration du bien-être humain grâce à la gestion de la diversité des insectes dans un monde en mutation”. Omondi Aman Bonaventure (ed.), Kekeunou Sévilor (ed.), Ouali-N’goran Mauricette (ed.), Salah Faiza Elgaili Elhassan (ed.), Tanga Mbi Chrysantus (ed.), Getu Emana (ed.), Zanou Elisabeth (ed.), Ayelo Pascal (ed.). Wad Medani : AAIS, Résumé, 96. 22nd Meeting and Conference of the African Association of Insect Scientists, Wad Medani, Soudan, 23 Octobre 2017/26 Octobre 2017.

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Résumé : Antestia bug, Antestiopsis thunbergii Gmelin (Heteroptera: Pentatomidae) is a major pest of Coffea arabica in eastern Africa. The pest damages both the vegetative and reproductive parts of the coffee plant but requires green (unripe) berries for nymphal development and adult reproduction. Consequently, the pest strongly prefers to feed on green berries in the field than any other coffee parts. In nature, insects often use their olfactory system to recognize and locate suitable hosts and avoid non suitable hosts. The identification of plant volatiles that act as pest kairomones (attractants) or allomones (defence/ repellent) can potentially lead to development of environmentally friendly pest management options. Our study compared the chemical profiles of unripe and ripe coffee berries. In addition, electrophysiological and behavioural responses of the pest to compounds unique to ripe berries were studied. Our findings on the olfactory cues used by the pest to avoid ripe berries (a non preferred host) and the implication in Antestia bug management in a “push- pull” system will be discussed.

Classification Agris : H10 - Ravageurs des plantes

Auteurs et affiliations

• Njihia Teresiah, ICIPE (KEN)
• Torto Baldwin, ICIPE (KEN)
• Murungi Lucy Kananu, Jomo Kenyatta University of Agriculture and Technology (KEN)
• Irungu Janet, ICIPE (KEN)
• Mwenda Dickson, ICIPE (KEN)
• Babin Régis, CIRAD-BIOS-UPR Bioagresseurs (KEN) ORCID: 0000-0002-3753-1193

Source : Cirad-Agritrop (https://agritrop.cirad.fr/586936/)

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