First record of Leptopilina japonica Novković & Kimura, 2011 (Hymenoptera: Figitidae) in Germany, a parasitoid of the Spotted Wing Drosophila Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae)

Abstract

Two years after the first European record in Italy, we report the first occurrence of the parasitoid wasp Leptopilina japonica Novković & Kimura, 2011 (Hymenoptera: Figitidae) in Germany. The species is a larval‐pupal parasitoid of Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae), which is a widespread invasive and economically important pest of soft‐skinned fruit. In total, we found 29 specimens of L. japonica in five different locations in southern and western Germany in the years 2021, 2022 and 2023. We examined the specimens morphologically and generated their DNA barcodes for identification. In three of the locations, L. japonica was sampled from raspberries. In two locations, L. japonica was caught in two and three consecutive years, respectively, which indicates adventive establishment. As D. suzukii and L. japonica originate from the same region in Asia, the possible establishment of L. japonica could be a case of unintentional biological control in Germany. In addition to this first record in Germany, we present a diagnosis of L. japonica to distinguish the species from the rest of the European Leptopilina fauna.