Spatial and genetic crop diversity support ecosystem service delivery: A case of yield and biocontrol in Dutch organic cabbage production

•We developed and validated a diagrammatic scale to assess herbivore leaf-feeding injury in cabbage.•We used an experimental network of seven intercropping designs.•Crop diversification via intercropping reduced herbivore feeding injury in cabbage.•Lower injury was observed with the presence of a within-field functional flower strip.•Individual and total yields were maintained in five out of seven intercropping designs.