Tethered-flight performance of thermally-acclimated pest fruit flies (Diptera: Tephritidae) suggests that heat waves may promote the spread of Bactrocera species

Malod Kevin, Bali Eleftheria-Maria D., Gledel Corentin, Moquet Laura, Bierman Anandi, Bataka Evmorfia, Weldon Christopher, Karsten Minette, Delatte Hélène, Papadopoulos Nikos, Terblanche John S.. 2023. Tethered-flight performance of thermally-acclimated pest fruit flies (Diptera: Tephritidae) suggests that heat waves may promote the spread of Bactrocera species. Pest Management Science, 79 (11) : 4153-4161.

https://doi.org/10.1002/ps.7611

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Url - jeu de données - Entrepôt autre : https://doi.org/10.6084/m9.figshare.23300726

Résumé : BACKGROUND: Thermal history may induce phenotypic plasticity in traits that affect performance and fitness. One type of plastic response triggered by thermal history is acclimation. Because flight is linked to movement in the landscape, trapping and detection rates, and underpins the success of pest management tactics, it is particularly important to understand how thermal history may affect pest insect flight performance. We investigated the tethered-flight performance of Ceratitis capitata, Bactrocera dorsalis and Bactrocera zonata (Diptera: Tephritidae), acclimated for 48 hours at 20, 25 or 30°C and tested at 25°C. We recorded the total distance, average speed, number of flight events and time spent flying during 2-hour tests. We also characterized morphometric traits (body mass, wing shape and wing loading) that can affect flight performance. RESULTS: The main factor affecting most flight traits was body mass. The heaviest species, B. dorsalis, flew further, was faster and stopped less often in comparison with the two other species. Bactrocera species exhibited faster and longer flight when compared with C. capitata, which may be associated with the shape of their wings. Moreover, thermal acclimation had sex- and species-specific effects on flight performance. Flies acclimated at 20°C stopped more often, spent less time flying and, ultimately, covered shorter distances. CONCLUSION: Flight performance of B. dorsalis is greater than that of B. zonata and C. capitata. The effects of thermal acclimation are species-specific. Warmer acclimation temperatures may allow pest fruit flies to disperse further and faster.

Mots-clés Agrovoc : Tephritidae, Ceratitis capitata, Bactrocera dorsalis, Bactrocera, Ceratitis, lutte anti-insecte, phénotype, plasticité phénotypique

Mots-clés géographiques Agrovoc : La Réunion

Mots-clés libres : Tephritidae, Thermal history, Flight performance, Phenotypic plasticity

Classification Agris : H10 - Ravageurs des plantes

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

Agences de financement européennes : European Commission

Programme de financement européen : H2020

Projets sur financement : (EU) In-silico boosted, pest prevention and off-season focused IPM against new and emerging fruit flies ('OFF-Season' FF-IPM)

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