594887 Disclosed herein is the combined use of synthetic fungicides such as boscalid, metrafenone or dithianon and the biological control agent Bacillus subtilis for controlling harmful fungi. To be more precise, disclosed is a method for controlling harmful fungi, which comprises at least two treatment blocks, where in at least one treatment block the plants are treated with at least one synthetic fungicide and in at least one treatment block the plants are treated with at least one biological control agent, with the proviso that the last treatment block comprises subjecting the plants to at least one treatment with at least one biological control agent.
