DOI: 10.5061/dryad.qnk98sfpm
title: Performance of selected lines of Trichopria drosophilae and of Ganaspis brasiliensis on different fruit

description: 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. drosophilae in
 raspberries with a co-evolved specialist larval parasitoid Ganaspis
 brasiliensis from Asia that was recently approved for release in the USA.
 More adult parasitoids emerged in each fruit type of the adapted compared
 to the non-adapted population of T. drosophilae. Drosophila
 suzukii emergence rates were reduced on average by 85% by the adapted T.
 drosophilae population indicating that the artificial rearing conditions
 did not significantly impair the ability of parasitoids to locate and
 attack hosts in natural hosts. The specialist G. brasiliensis had higher
 adult emergence than the adapted population of T. drosophilae, however,
 both parasitoid species were able to reduce D. suzukii populations to the
 same extent. These results show that despite the lower developmental
 success of the laboratory selected T. drosophilae they killed the same
 proportion of D. suzukii as G. brasiliensis when host choice was
 restricted. In nature, where host choices are available specialist and
 generalist parasitoids will be unlikely to exhibit the same biocontrol
 potential.
description: Collected in the laboratory.
description: # Performance of selected lines of Trichopria drosophilae and of Ganaspis
 brasiliensis on different fruit
 [https://doi.org/10.5061/dryad.qnk98sfpm](https://doi.org/10.5061/dryad.qnk98sfpm) Give a brief summary of dataset contents, contextualized in experimental procedures and results. ## Description of the data and file structure In the first tab data for 'experiment 1' is given. The second tab contains data for 'experiment 2'. Fruit experiment (first tab) Column A: the fruit type used Column B: the parasitoid treatment used Column C: the number of parasitoid wasps used Column D: the temporal block the treatments were tested, the two blocks are one week apart Column E: cage number = replicate; in each cage there was fruit placed on the ground or elevated, hence two lines for each replicate Column F: ‘up’ refers to fruit elevated and ‘down’ refers to fruit on the ground, for the control treatment no parasitoids were released therefore the position of the fruit during parasitism is not applicable that is noted as 'na' or 'n/a' in the dataset Column G: the number of spotted wing drosophila emerging Column H: the number of parasitoid wasps emerging   Plant experiment (second tab) Column A: the parasitoid treatment used (control – no parasitoids released) Column B: cage number = replicate; in each cage there was fruit placed on the ground or elevated, hence two lines for each replicate except for the control line where no parasitoids were released Column C: ‘up’ refers to fruit elevated and ‘down’ refers to fruit on the ground, for the control treatment no parasitoids were released therefore the position of the fruit during parasitism is not applicable that is noted as 'na' or 'n/a' in the dataset Column D: the number of spotted wing drosophila emerging Column E: the number of parasitoid wasps emerging