Baited Pherocon AM traps measure 9"x11" unfolded with a 7"x9" sticky grid. Use for: Rhagoletis Species: Blueberry Maggot Fly, Apple Maggot Fly and Cherry Fruit Flies. Replace every 2-3 weeks. Food attractant in the sticky surface dissipates in approximately seven days. Package of 25 traps.