Interspecific interactions between a new invasive Tephritid fruit fly, Bactrocera dorsalis, and other resident species in an insular context

Jobart Benoit, Payet Jim, Glenac Serge, Delatte Hélène, Moquet Laura. 2019. Interspecific interactions between a new invasive Tephritid fruit fly, Bactrocera dorsalis, and other resident species in an insular context. In : Book of abstracts posters of the third international conference on Island ecology, evolution and conservation. Flores Olivier (ed.), Ah-Peng Claudine (ed.), Wilding Nicholas (ed.). Université de la Réunion. Saint-Denis : Université de la Réunion, Résumé, 330. International conference on Island ecology, evolution and conservation. 3, Saint-Denis, Réunion, 8 Juillet 2019/13 Juillet 2019.

Résumé : The impact of biological invasions of insects considered as pests have important negative impacts on the economy and the environment, particularly in insular ecosystems. Since the detection of one of the most harmful pest of fruit and vegetable crops, Bactrocera dorsalis, in April 2017, La R´eunion counts nowadays nine pests species of Tephritid fruit flies of economic importance. A biological control agent, the braconid wasp, Fopius arisanus, was initially introduced in La Reunion in 2003 to control another fruit fly of the same genus: the peach fruit fly, Bactrocera zonata. Bactrocera dorsalis, in its native area is the main host of this braconid wasp and will probably be able to parasitize it in La R´eunion. To understand the invasion process of B. dorsalis and the impact of this new introduced fruit fly on the community structure of the resident Tephritid species, and the parasitoid, F. arisanus, it is necessary to study the competition interactions. We first assessed the interspecific competition between Bactrocera dorsalis and four other fruit flies, Bactrocera zonata, C. capitata, C. quilicii and Ceratitis catoirii. Three of those fruit flies are successive invaders in La Reunion and one endemic species. We focused our study on the interference competition among pairs of adults, measuring the ability of a female to remove another one from a fruit for the laying behavior in controlled environments.The parasitoid preference for both sympatry species of genius Bactrocera were observed. On one hand, we observed the preference for eggs only and on the other hand, the preference for one particular species according to the host fruit in choice experiments.

Auteurs et affiliations

• Jobart Benoit
• Payet Jim, CIRAD-BIOS-UMR PVBMT (REU)
• Glenac Serge, CIRAD-BIOS-UMR PVBMT (REU)
• Delatte Hélène, CIRAD-BIOS-UMR PVBMT (REU)
• Moquet Laura, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0001-7873-2218

Source : Cirad-Agritrop (https://agritrop.cirad.fr/594131/)

Métriques

[ Page générée et mise en cache le 2023-10-29 ]