
The parasitoid wasp Trichopria drosophilae has evolved specialized molecular and ecological adaptations, including the use of venom proteins to arrest host development, teratocyte cells to digest host tissues, and conditional tolerance of intraspecific competition and avoidance of interspecific competition, enabling it to successfully parasitize a broad range of Drosophila hosts, including the invasive pest Drosophila suzukii.


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The success of an organism depends on the molecular and ecological adaptations that promote its beneficial fitness. Parasitoids are valuable biocontrol agents for successfully managing agricultural pests, and they have evolved diversified strategies to adapt to both the physiological condition of hosts and the competition of other parasitoids. Here, we deconstructed the parasitic strategies in a highly successful parasitoid, Trichopria drosophilae , which parasitizes a broad range of Drosophila hosts, including the globally invasive species D. suzukii . We found that T. drosophilae had developed specialized venom proteins that arrest host development to obtain more nutrients via secreting tissue inhibitors of metalloproteinases (TIMPs), as well as a unique type of cell— teratocytes—that digest host tissues for feeding by releasing trypsin proteins. In addition to the molecular adaptations that optimize nutritional uptake, this pupal parasitoid has evolved ecologically adaptive strategies including the conditional tolerance of intraspecific competition to enhance parasitic success in older hosts and the obligate avoidance of interspecific competition with larval parasitoids. Our study not only demystifies how parasitoids weaponize themselves to colonize formidable hosts but also provided empirical evidence of the intricate coordination between the molecular and ecological adaptations that drive evolutionary success.

### Competing Interest Statement

The authors have declared no competing interest.

Coordinated molecular and ecological adaptations underlie a highly successful parasitoid

molecular-and-ecological-adaptations-enable-a-highly-successful-parasitoid-wasp-to-parasitize-a-broad-range-of-drosophila-hosts-including-the-invasive-pest-drosophila-suzukii


Molecular and Ecological Adaptations Enable a Highly Successful Parasitoid Wasp to Parasitize a Broad Range of Drosophila Hosts, Including the Invasive Pest Drosophila suzukii
