Phero-Si MD food for Plodia interpunctella, Ephestia kuehniella, Ephestia elutella, Cadra cautella and Cadra figulilella is a sex pheromone release device, and is capable of attracting males. To be used inside a trap so that the attracting action of the pheromone leads to the monitoring of the above-mentioned pests. The addition of ferrite to the silicone mixture enables the dispenser to be detected by metal detectors, making it particularly suitable for use in food plants or environments where avoiding contamination by foreign bodies is extremely important.