Performance of selected lines of Trichopria drosophilae and of Ganaspis brasiliensis on different fruit

A few generations of laboratory selection can increase the developmental success of native parasitoids on invasive targets. However, for this approach to be used more widely for biological control we need to understand if the improved performance of native species, achieved under artificial laboratory conditions, translates to improved control in more natural environments. It is also unknown what the biocontrol potential of laboratory selected generalist native parasitoids may be compared to co-evolved specialists that are typically introduced for biological control of invasive species. To assess how rearing in artificial diet affected host finding ability in natural hosts we used laboratory selected (adapted) and non-adapted populations of the generalist native parasitoid Trichopria drosophilae to parasitize the invasive fly, Drosophila suzukii in three different fruit types. In a separate experiment, we compared the effectiveness of adapted and non-adapted populations of T. drosophila...经数代实验室选育，可提升本地寄生性天敌在入侵靶标生物上的发育成功率。然而，若要将该方法更广泛地应用于生物防治（biological control），我们需要明确：在人工实验室条件下获得的本地天敌性能提升，能否在更贴近自然的环境中转化为更优的防治效果。此外，相较于通常用于入侵物种生物防治的协同进化专性天敌，经实验室选育的广食性本地寄生性天敌的生物防治潜力究竟如何，目前仍属未知。为探究人工饲料饲养如何影响寄生性天敌对自然寄主的搜寻能力，我们选取经实验室选育（驯化）的广食性本地寄生性天敌果蝇茧蜂（Trichopria drosophilae）及其未驯化种群，在三种不同果实类型中寄生入侵性昆虫斑翅果蝇（Drosophila suzukii）。在另一项独立实验中，我们比较了果蝇茧蜂（T. drosophilae）驯化种群与非驯化种群的防治效力……