Lauciello Noémie, Mille Christian Gilbert, Hafsi Abir, Jacob Vincent, Duyck Pierre-François
IAC, Equipe ARBOREAL La Foa New Caledonia.
CIRAD, UMR PVBMT Saint-Pierre France.
Ecol Evol. 2024 Aug 13;14(8):e70170. doi: 10.1002/ece3.70170. eCollection 2024 Aug.
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 () and a highly specialist species, the breadfruit fruit fly () 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. infested only fruits in the field. Accordingly, larvae survived and developed only on fruits belonging to the s genus. Female did not lay their eggs on non- fruits, except . Female , 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.
植食性昆虫对寄主植物的专一化程度各不相同。范围从单食性或寡食性物种（只能在单一寄主植物或寄主植物科上发育）到极端多食性物种（能在许多不同植物科的植物上发育）。本研究的目的是比较一种高度泛食性物种昆士兰果蝇（Bactrocera tryoni）和一种高度专食性物种面包果果蝇（Bactrocera zonata）在涵盖这两个物种寄主范围的几种果实上的幼虫表现和成虫偏好。（i）在16种果实物种上测试幼虫表现，（ii）在5种果实物种的子集上测试雌虫偏好。此外，（iii）对11种果实物种进行了田间调查。在田间，面包果果蝇仅侵染桑科果实。因此，面包果果蝇幼虫仅在属于桑属的果实上存活和发育。除了无花果外，面包果果蝇雌虫不在非桑科果实上产卵。另一方面，昆士兰果蝇雌虫在测试的果实之间几乎没有选择，其幼虫在测试的16种果实物种中的13种上发育。当通过雌虫偏好进行测试时，两个物种的幼虫表现很大程度上预测了田间的果实侵染情况。这些数据对于更好地估计物种未建立地区的入侵风险至关重要。
