Bait sprays combined with insecticides targeted at Drosophila suzukii have negligible impacts on non-target insects compared to full foliar spray applications

Current control of the invasive pest Drosophila suzukii relies primarily on insecticides, including the incorporation of phagostimulant baits. The impact of insecticidal bait sprays on beneficial insects in crops is largely unknown. Using a laboratory and field trial, we exposed non-target insects to insecticides with or without bait and compared these to non-insecticide controls. In laboratory arena tests, we assessed the impact on mortality. In the subsequent commercial raspberry field trial, 1 m width spray bands of bait were applied weekly, using alternating 25% or 50% field rates of spinosad and cyantraniliprole respectively.
Results from the laboratory assays separated the insects into three categories: 1) adult Eupeodes corollae, Forficula auricularia, and Orius laevigatus, 2) adult Drosophila melanogaster, and 3) larval Chrysopa sp. and Adalia bipunctata. In the first group, bait + spinosad or spinosad alone were equally detrimental to the life expectancy of insects. For D. mela..., Two main experiments were done, the first on six non-target insects in a laboratory bioassay evaluating the toxicity of baits alone or in combination with an insecticide (spinosad) in comparison to the insecticide alone, or controls without insecticides. The second was a field trial in a commercial raspberry crop comprising a programme of alternating insecticides (spinosad and cyantraniliprole) as either a full foliar spray or as a reduced rate in combination with a bait spray. Impacts on non-target insects were assessed.
Laboratory Bioassays
Six non-target insects commonly encountered in fruit crops were tested (Table 1): 1) Orius laevigatus (Fieber) adults, a commonly used predatory biocontrol agent for the control of thrips; 2) Forficula auricularia L. adults, a common generalist predator of orchard pests; 3) Eupeodes corollae Fabricius adults, pollinators with larvae that predate aphids; 4) Drosophila melanogaster Meigen adults, common fruit fly from a wide range of habitats that co..., , # Bait sprays combined with insecticides targeted at Drosophila suzukii have negligible impacts on non-target insects compared to full foliar spray applications

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

## Description of the data and file structure

Dataset was written onto standard company datasheets and then transferred into Excel sheets.

### Files and variables

#### File: Arthropod\_survey.xlsx

**Description:** tap samples of invertebrates from raspberry plants

##### Variables

* 27 arthropod taxa
* 6 treatments which were colour coded
* 4 assessments - including a preassessment

#### File: Melanogaster\_Lab\_Assay.xlsx

**Description:** Lab mortality data

##### Variables 

* alive - moving
* l_moribund - moving but not normally
* h_moribund - on back but legs twitching
* dead - immobile
* 3 assessment dates
* 6 replicates
* 5 treatments

#### File: Orius\_Lab\_Assay\_-\_DATAv2.xlsx

**Description:** Lab mortality data

##### Varia...,