Quote Originally Posted by Greengage View Post
I was telling some of the beekeepers about this sound idea last night and the told me it was nothing new and to look up the late Eddie F. Woods who invented The Apidictor and patented, and marketed it in the 1960s. So i did and came across these articles even one to build your own.
http://www.beehacker.com/wp/?page_id=103
http://beesource.com/build-it-yourself/apidictor/
That very small DARG study by Richard Ball (ex head of the inspectors south of the border) is compatible with the bee gym working as advertised. However one hive with a bee gym and one control isn't nearly enough.

The Apidictor listens in (and seems to work) whereas the Varroa control thing blasts them with sound. The Apidictor filters out the sound of several thousand young bees getting ready to fly off with the swarm. Swarms have many young bees in them and this preparation of young bees to fly is characteristic of colonies approaching swarming.