I use LGO for swarms, but not traps. It may attract feral bees and cause robbing. Remember, the tree bees swarmed from another hive within a 1/4 mile of the tree. That hive may still be alive and strong. You don't want it robbing your trap. Just be sure they can WALK from the cone base into the trap box. They can smell the brood that way, and don't need more attractant.