Blog readers might recognize this as my plum codling moth pheromone trap. The little rubber thingy in the centre of this sticky paper gives off the female "come and get it boys" pheromone. Those poor little male codling moths fly right in there with their little tentacles erect... and stick to the sticky stuff. Here is the trap I put in 6 weeks ago. The pheromone capsule lasts about that long and I replaced them with a fresh one today. It really works! Last year there were hardly any maggots in my plums. Highly recommended.