Phytoparasitica (2021) 49, 207-215

Daiana da Costa Oliveira, Paloma Stupp, Liliane Nachtigall Martins, Jutiane Wollmann, Fernanda Carla Santos Geisler, Taís Dalla Nora Cardoso, Daniel Bernardi and Flávio Roberto Mello Garcia (2021)
Interspecific competition in Trichopria anastrephae parasitism (Hymenoptera: Diapriidae) and Pachycrepoideus vindemmiae (Hymenoptera: Pteromalidae) parasitism on pupae of Drosophila suzukii (Diptera: Drosophilidae)
Phytoparasitica 49 (2), 207-215
Abstract: Trichopria anastrephae Lima and Pachycrepoideus vindemmiae (Rondani) naturally occur together with the pest Drosophila suzukii (Matsumura) in Brazil. Due to their co-occurrence, it is important to understand competitive interactions between these pupal parasitoids and how this may impact D. suzukii parasitism levels. Thus, the aim of the study was to evaluate the interspecific competition between T. anastrephae and P. vindemmiae. Bioassays were performed with and without time advantage, with different exposure (treatments) of D. suzukii pupae to parasitoid species. Verified that there was a higher parasitism and emergence rate of T. anastrephae adults. This was not observed for P. vindemmiae that decreases the parasitism rate in the presence of T. anastrephae. In strawberry fruits bioassay, T. anastrephae females showed capacity to parasitize pupae of D. suzukii inside strawberry fruits. However, P. vindemmiae had a lower parasitism rate and consequently, fewer insects emerged when used alone or associated with the presence of T. anastrephae. Therefore, we can conclude that there is interspecific competition between T. anastrephae and P. vindemmiae in D. suzukii pupae, with T. anastrephae having a higher competitive advantage.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Flávio Roberto Mello Garcia

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Drosophila suzukii	Strawberry (Fragaria)	Brazil (south)
Pachycrepoideus vindemmiae (parasitoid)	Drosophila suzukii	Strawberry (Fragaria)	Brazil (south)
Trichopria anastrephae (parasitoid)	Drosophila suzukii	Strawberry (Fragaria)	Brazil (south)