People who come to the vineyards are surprised to find rose bushes planted among the vines. The motif is not decorative, but preventive. The vines are extremely sensitive to the attack of a fungus, which causes a disease called “powdery mildew”, very harmful and difficult to eradicate if not detected early.
This fungus also attacks delicate flowers, such as roses, and their symptoms (leaf spots) are visible earlier on the roses than on the vines. Therefore, the reason is that the rose bush serves as an alarm to detect the disease in time and treat it in the vineyard before it is too late.