Detections of Leptopilina japonica in Canada and the USA. Grey shading indicates the States (CA = California, DE = Delaware, GA = Georgia, ME = Maine, MD = Maryland, MI = Michigan, NJ = New Jersey, NY = New York, NC = North Carolina, PA = Pennsylvania, OR = Oregon, WA = Washington) and Province (ON = Ontario) where sampling took place in the present study. Blue circles represent parasitoids obtained from sentinel baits and as by-catch in Drosophila suzukii traps, green circles represent parasitoids reared from ripe fruit collections and red circles show the absence of parasitoids from fruit collections. Note that adventive L. japonica was already previously reported from British Columbia (BC), Canada (Abram et al. 2020) and Washington, USA (Beers et al. 2022) and these previous finding were not included in the present study.