This is the first report of ToLCNDV in France. Since ToLCNDV is highly damaging in cucurbits and is a quarantine pest in Europe, it is important to prevent its emergence in France, particularly in the southeast which constitutes France's most important cucurbit production area. The presence of ToLCNDV in four locations within a 30 km range suggests that it has begun to spread efficiently or that multiple introductions have occurred. It is now important to prevent virus overwintering in weeds (Juárez et al., 2019) and be careful to detect and eradicate potential infections in the next growing season.