New records of the parasitoids of Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae) in newly invaded areas in Turkey: molecular identification

Abstract

Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae) is an invasive pest species of various fruit crops in the USA and Europe. Although D. suzukii has been recently reported in strawberry in Erzurum and other newly invaded areas in Turkey (e.g., Ankara, Bolu, Canakkale and Duzce), there is only limited information on its indigenous parasitoids. In this study, four hymenopteran parasitoids, the larval parasitoids of Leptopilina boulardi (Barbotin, Carton & Kelner-Pillault, 1979), Leptopilina heterotoma (Thomson, 1862) (Figitidae) and the pupal parasitoids of Pachycrepoideus vindemmiae (Rondani, 1875) (Pteromalidae) and Trichopria drosophilae (Perkins, 1910) (Diapriidae), were collected from frugivorous drosophilid species. Leptopilina boulardi and T. drosophilae were found for the first time in Turkey. Leptopilina heterotoma and P. vindemmiae were the most common parasitoid species, reared from field-collected fruit samples in this study. The laboratory assays revealed that both pupal parasitoids developed from D. suzukii pupae, but the association of L. heterotoma and L. boulardi with D. suzukii is yet to be confirmed. The PCR amplification of the cytochrome c oxidase subunit I loci of mtDNA of the representative four parasitoid samples produced different lengths of DNA fragments, ranging from 633 bp to 658 bp. BLASTn queries based on the COI of the parasitoid samples showed that the sequences were 99-100% identical to those of the corresponding species in the GenBank database.