Sulfoximines, the next generation systemic insecticides developed to replace neonicotinoids, have been shown to
negatively impact pollinator development and reproduction. However, field-realistic studies on sulfoximines are
few and consequences on pollination services unexplored. Moreover, the impacts of other agrochemicals such as
fungicides, and their combined effects with insecticides remain poorly investigated. Here, we show in a full
factorial semi-field experiment that spray applications of both the product Closer containing the insecticide
sulfoxaflor and the product Amistar containing the fungicide azoxystrobin, negatively affected the individual
foraging performance of bumblebees (Bombus terrestris). Insecticide exposure further reduced colony growth and
size whereas fungicide exposure decreased pollen deposition. We found indications for resource limitation that
might have exacerbated pesticide effects on bumblebee colonies. Our work demonstrates that field-realistic
exposure to sulfoxaflor can adversely impact bumblebees and that applications before bloom may be insufficient
as a mitigation measure to prevent its negative impacts on pollinators. Moreover, fungicide use during
bloom could reduce bumblebee foraging performance and pollination services.