Augmentative release of two <em>Drosophila</em> parasitoids did not suppress competitor populations in a vineyard

In this study, we released two widely used pupal parasitoids, Trichopria drosophilae Perkins (Hymenoptera: Diapriidae)&nbsp;and Pachycrepoideus vindemiae&nbsp;(Rondani) (Hymenoptera: Pteromalidae),&nbsp;into vineyards to test whether augmentative release of T. drosophilae&nbsp;or P. vindemiae&nbsp;suppresses the wild populations of the other species.&nbsp;We investigated whether the augmentative release of two pupal Drosophila&nbsp;parasitoid species (Trichopria drosophilae&nbsp;and Pachycrepoideus vindemiae) in the vineyard decreases the emergence rate of their competitors. Parasitoid emergence rate, parasitism rate, and host mortality were recorded. , The insects The P.&nbsp;vindemiae&nbsp;and T. drosophilae&nbsp;populations were collected in a vineyard (36.66°N, 121.28°E) in Jinan, Shandong Province, China. They are reared&nbsp;in the lab&nbsp;by Shandong Academy of Agricultural Sciences&nbsp;using Drosophila&nbsp;melanogaster&nbsp;Meigen&nbsp;pupae. All populations were maintained in growth chambers at 25±0.5°C, 70%±0.5% relative humidity, and a photoperiod of 16:8 hours (Light: Dark). Experimental design Three trials with three different grape cultivars (Ruby Seedless, Concord, Kyoho) were conducted in a vineyard in 2022, where pesticide was prohibited. Our preliminary investigation before the experiment showed that P.&nbsp;vindemiae&nbsp;is the dominant parasitoid with over 20 times higher population density than T.&nbsp;drosophilae&nbsp;in the studied vineyards. For each trial, we established&nbsp;a control plot&nbsp;(without releasing&nbsp;parasitoids) plus&nbsp;two treatment&nbsp;plots:&nbsp;one&nbsp;releasing T.&nbsp;drosophi..., # Augmentative release of two *Drosophila* parasitoids did not suppress competitor populations in a vineyard Dataset DOI: [10.5061/dryad.rfj6q57n9](10.5061/dryad.rfj6q57n9) ## Description of the data and file structure Parasitoid emergence rate, parasitism rate, and host mortality were recorded. ### Files and variables #### File: Emergence_data.csv **Description:** ##### Variables * CollectDate: Pupae collection time * Plot: 3plots * GrapeString: Two clusters of grapes as a unit * Treat: Parasitoids release treatments and control groups, including Release *Trichopria drosophilae*, Release *Pachycrepoideus vindemiae,* and Control.l * Group: 3 different treatments, including a, b, d * ReleaseT: Whether to release *Td.*: 1 for yes, 0 for no * ReleaseP: Whether to release *Pv.*: 1 for yes, 0 for no * PupaNumber: Number of pupae collected * AlonePupaNumber: Selected pupae were individually placed in test tubes plugged with cotton, and counts were made after their emergence. * AloneT...,