There is overwhelming evidence that biodiversity is a major driver of ecosystem dynamics and functioning, but the relationship between biodiversity and biological control in agroecosystems is still poorly understood. Predictive ability is limited by a focus upon simple community descriptors of natural enemies at local geographic scales. The overarching aim of this project is to deepen our understanding of the biodiversity and ecosystem functioning (BEF) relationship though the analysis of molecularly-derived, multi-species interaction networks across a range of spatial scales in Swedish agroecosystems.