Environmental Stress Increases Synergistic Effects of Pesticide Mixtures on Daphnia magna

Some widely used pesticide mixtures produce more than additive effects according to conventional combined effect models. However, synergistic effects have been so far generally observed at unrealistically high pesticide concentrations. Here, we used Daphnia magna as a test organism and investigated how food limitation—a common ecological stressor—affects the mixture toxicity of a pyrethroid insecticide and azole fungicide. We also compared three...