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Master Thesis

Étude de l'efficacité du parasitoïde Ganaspis cf. brasiliensis pour la gestion de Drosophila suzukii, ravageur invasif en culture de fraise sous abri

Abstract : Drosophila suzukii is a highly polyphagous invasive pest from Asia which mainly attacks soft fruits. Its ability to lay eggs in ripe or ripening berries causes important damage, as in cherry and strawberry crops. Until now, there is no satisfaying control method in terms of efficacy and environment safety. In that regard, biological control is a lever widely studied. Indigenous parasitoids have not shown enough efficacy so scientific interest is now focused on exotic parasitoids. As part of the CASDAR project DS², larval parasitoid Ganaspis cf. brasiliensis has been chosen as a potential candidate for biological control because of its specificity for D. suzukii and its efficiency in its native area. Two strains of G. cf. brasiliensis, that have been selected in previous laboratory tests, have been tested in the present study. Releases of G. cf. brasiliensis were carried out in 3 insect-proof greenhouse compartments of 60m², on a strawberry crop previously infested with D. suzukii, and compared to untreated control. However, no parasitoid emerged from the fruits collected each week. Therefore, this trial did not allow us to conclude on the potential of the parasitoid as a biological control agent. Further studies are needed in order to conclude about the efficiency of the parasitoid.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-02335876
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Pauline Passeri. Étude de l'efficacité du parasitoïde Ganaspis cf. brasiliensis pour la gestion de Drosophila suzukii, ravageur invasif en culture de fraise sous abri. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02335876⟩

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