| Title: | Olive fruit volatiles route intraspecific interactions and chemotaxis in Bactrocera oleae (Rossi) (Diptera: Tephritidae) females |
| Author(s): | Giunti G; Campolo O; Laudani F; Algeri GM; Palmeri V; |
| Address: | "Department of Agriculture, University 'Mediterranea' of Reggio Calabria, Loc. Feo di Vito, 89122, Reggio Calabria, Italy. Department of Agriculture, University 'Mediterranea' of Reggio Calabria, Loc. Feo di Vito, 89122, Reggio Calabria, Italy. orlando.campolo@unirc.it" |
| DOI: | 10.1038/s41598-020-58379-8 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Plant nutritional quality and chemical characteristics may affect the fitness of phytophagous insects. Here, the olfactory preferences of Bactrocera oleae (Rossi) females toward olives with different maturation and infestation status were evaluated in three cultivars: Ottobratica, Roggianella and Sinopolese. Volatile profiles from olives were identified by SPME/GC-MS. Choice tests were performed to determine the responses of B. oleae adult females toward fruits and pure chemicals linked to infestation degree. Cultivar was the main source of variability explaining the differences recorded in volatile emissions. Moreover, three VOCs [beta-myrcene, limonene and (E)-beta-ocimene] were associated to infestation status across all olive varieties. In choice-tests, B. oleae females always preferred the olfactory cues from low-infested over high-infested fruits. Therefore, choice-tests using synthetic VOCs, emitted in greater amount by high-infested fruit, were arranged in order to identify putative B. oleae kairomones. While females were indifferent to beta-myrcene, the highest dosages of limonene and (E)-beta-ocimene were unfavoured by the tested flies, which preferentially moved toward the empty arm of the Y-tube. Furthermore, females preferred the lowest concentration of beta-ocimene compared to the highest one. These results supported our hypothesis that fruit VOCs may serve as kairomones for female flies" |
| Keywords: | Acyclic Monoterpenes/chemistry Alkenes/chemistry Animals Chemotaxis/physiology Female Food Preferences/physiology Fruit/chemistry/parasitology Gas Chromatography-Mass Spectrometry Host Specificity Limonene/chemistry Odorants/analysis Olea/*chemistry/*para; |
| Notes: | "MedlineGiunti, Giulia Campolo, Orlando Laudani, Francesca Algeri, Giuseppe Massimo Palmeri, Vincenzo eng Research Support, Non-U.S. Gov't England 2020/02/06 Sci Rep. 2020 Feb 3; 10(1):1666. doi: 10.1038/s41598-020-58379-8" |
