Comparative adult preference–larval performance relationship between a specialist and a generalist tephritid: Implication for predicting field host-range

Lauciello Noémie, Mille Christian, Hafsi Abir, Jacob Vincent, Duyck Pierre François. 2024. Comparative adult preference–larval performance relationship between a specialist and a generalist tephritid: Implication for predicting field host-range. Ecology and Evolution, 14 (8):e70170, 12 p.

Résumé : Phytophagous insects differ in their degree of specialization to their host plants. It ranges from monophagous or oligophagous species that can only develop on a single host plant, or family of host plants, to extremely polyphagous species that can develop on plants from many distinct botanical families. The aim of this study was to compare the larval performance and adult preference of a highly generalist species, the Queensland fruit fly (Bactrocera tryoni) and a highly specialist species, the breadfruit fruit fly (B. umbrosa) among several fruits covering both species' host range. (i) larval performance was tested on 16 fruit species, and (ii) a female preference was tested on a subset of five fruit species. In addition, (iii) a field survey was carried out on 11 fruit species. B. umbrosa infested only Artocarpus fruits in the field. Accordingly, B. umbrosa larvae survived and developed only on fruits belonging to the Artocarpus genus. Female B. umbrosa did not lay their eggs on non-Artocarpus fruits, except Terminalia catappa. Female B. tryoni, on the other hand, made little selection between the fruits tested, and its larvae developed on 13 of the 16 fruit species tested. The larval performance of both species, adjusted when tested by female preference, predicted in large part the fruit infestation in the field. These data are essential to better estimate invasion risk where the species are not established.

Mots-clés Agrovoc : Tephritidae, plante hôte, Bactrocera, Bactrocera tryoni, phylogénie, compétition interspécifique, Cucurbitaceae, jaquier, larve, agroécologie, Artocarpus

Mots-clés géographiques Agrovoc : France, Nouvelle-Calédonie

Mots-clés complémentaires : Bactrocera umbrosa

Mots-clés libres : Artocarpus, Bactrocera tryoni, Bactrocera umbrosa, Bioecology, Ecological niche, Host-fruits, Invasion, New Caledonia, Oligophagous insect, Performance–preference, Tephritidae

Classification Agris : H10 - Ravageurs des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

• Lauciello Noémie, IAC (NCL)
• Mille Christian, IAC (NCL)
• Hafsi Abir, CIRAD-BIOS-UMR PVBMT (REU)
• Jacob Vincent, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0002-7055-213X
• Duyck Pierre François, CIRAD-BIOS-UMR PVBMT (NCL) ORCID: 0000-0001-5484-1970 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/610150/)

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