“Best In Show” The mosquito trap that won Best in Show. It is a simple, long-term population control system. Mosquitoes lay their eggs in water. They use an invisible pheromone marker to tag the best egg-laying sites so they can find their way back again. The mosquito Trap works as a breeding site that has the exact same egg-laying pheromone that attracts female mosquitoes looking for a spot to lay eggs. The mosquitoes and other flying insects can not escape from the trap and drown.