 Cabbage stem flea beetles, CSFB, are a major pest of oil seed rape crops, but their control has become increasingly difficult since the ban on neonicotinoids in 2013. Entomopathogenic nematodes, EPNs, such as heterorebditis bacteriophora, stynanema felsi, stynanema carpacapsi, and stynanema krausii have shown promise in controlling CSFB populations in laboratory tests. However, further research is needed to determine if these EPNs can effectively control CSFB populations in the field. Additionally, it is important to ensure that the EPNs remain viable during application and transportation, so testing for compatibility with various adjuvants is essential. This article was authored by Claire Price, Heather Campbell, and Tom Pope.