The tomato leafminer Tuta absoluta (Meyrick; Lepidoptera: Gelechiidae) is an important pest species that has been introduced into Europe and Asia and which still has not reached its distribution limit. The pest has just started its expansion in China, the largest tomato producer in the world. Within a collaboration between the Institute of Plant Protection of the Chinese Academy of Agricultural Science (IPP-CAAS) and the Research Division of Agroecology and Environment (AOU) of Agroscope in Switzerland, we aim to support the development of a sustainable control strategy using parasitoid wasps. Since T. absoluta is a quarantine pest in China, the research in the country is very limited. Our collaborative approach is therefore a way to provide relevant information for future sustainable control of T. absoluta in China. Recently, several species of hymenoptera wasps have shown great potential as biological control agents against the pest. Unfortunately, several factors are limiting the success of its augmentative use including the low suitability of the tomato – T. absoluta system for supporting the parasitoids. Therefore, it is important to identify suitable candidate agents and understand the factors limiting their establishment in the field. We will evaluate the wasp performance in the tomato system and analyze the tritrophic interactions between the plant, the host and the parasitoids. We will then assess the compatibility with other control methods.