This dataset reports, for each plot and cropping season, the cumulative counts of six cotton bollworm species (Diparopsis watersi, Earias sp., Helicoverpa armigera, Pectinophora gossypiella, Spodoptera littoralis, Spodoptera frugiperda) monitored weekly across cotton-producing areas of Benin from 2018 to 2023, on a network of geolocated smallholder and experimental plots. R, 4.6.0 Raw data are owned by the IRC (Institut de Recherche sur le Coton / Cotton Research Institute) and are only accessible upon request and with IRC's permission.