Resistance assays of Drosophila suzukii populations from seven locations in Michigan and one location in Oregon

Host-parasitoid interactions are tied in coevolutionary arms races where parasitoids continuously have to evolve increased virulence as hosts evolve increased resistance. Over time geographic structure in virulence and resistance can arise because of spatial and temporal differences in parasitoid communities, in the strength of reciprocal selection pressures, in genetic variation in local populations, and as trade-offs are balanced between defense and fitness traits. It is crucial to understand how invasion changes the coevolutionary dynamics of host-parasitoid interactions to successfully implement biological control programs against invasive insect hosts. We investigated spatial and temporal variation in resistance of the invasive Drosophila suzukii in seven geographically distinct populations in Michigan and of one population from Oregon against a newly approved biocontrol agent, the larval parasitoid Ganaspis brasiliensis. We found regional and temporal variation in resistance (enca..., Drosophila suzukii was collected from seven locations in Michigan and one location in Oregon. Field collected flies were reared in the laboratory for one generation and then assayed for resistance to parasitism by Ganaspis brasiliensis.
, , # Resistance assays of Drosophila suzukii populations from seven locations in Michigan and one location in Oregon

[https://doi.org/10.5061/dryad.4xgxd25jg](https://doi.org/10.5061/dryad.4xgxd25jg)

## Description of the data and file structure

Second tab in an Excel file titled Istas_Szucs_DATA_for_dryad.xlsx contains the data.

* Column A: Location where D. suzukii was collected from, as shown in Figure 1 of the manuscript. N = North, W = West, SW = Southwest, WC = West Central, C = Central, EC = East Central, and E = East. OR = Oregon.
*  Column B: the sample type used to collect D. suzukii was either a banana trap, the collection of managed fruit, or unmanaged/wild fruit
* Column C: the month of the sampling, either Aug or Sept 2022
* Column D: the 5 replications for each location*month*sample treatment combinations.
* Column E: the number of larvae that was parasitized of the 10 larvae offered for each parasitoid female for each replicate
* Column F: the proportion of larvae...,