http://oregonstate.edu/ua/ncs/archives/2011/feb/pheromone-increases-foraging-honey-bees-leads-healthier-hives Link name pretty well says what it is all about. The pheromone is brood pheromone. But taking the study a bit further.. what are the implications of strong odor treatments (like essential oils) on colonies? The effect on queen pheromone has been noted in several posts. Bill Truesdell Bath, Maine *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm