In general all pheromone lures are good for 60 days. After that, they should be replaced with a new lure. If kept in a freezer or refrigerator, all lures should be good for at least a year. It really doesn't matter. Bullet lures should be placed in the bottom of the trap, but others can go in the top.
Pheromone traps are species specific.
They are designed to catch either one species or several closely related species.