This idea has been published many times on various discussion groups so it is impossible to attribute it to any individual.
I have made one for myself, but as yet I have not tested it. When I do put it into use I will publish my findings here.
It is simply constructed from a 2 litre plastic drinks bottle. The one that I have made and drawn at left is of clear plastic, but amber or other colours should not be a problem as I believe that the attraction is by smell.
A 30 mm diameter hole is cut in the side of the bottle, just below the shoulder of the neck.
I was originally concerned that this may allow rainwater into the interior of the bottle and I intended to place a shield over the top of the hole, but when I hung it up with baling twine (with the noose opposite the hole)... The bottle tilted and obviated the need to do this.
The mixture is made up and the bottle is topped up with water until all the liquid represents 75% of the volume of the bottle.
I doubt that the quantities or qualities of the ingredients will make much difference.
I expect that fermentation will take place, which may make the mixture repugnant to human noses, but no doubt waxmoths have a different perspective on this.
To use the trap... Just hang it up using a loop of baling twine, near to hives in the apiary.
I presume that the moths are attracted, enter and just drown.
Written... 24 January 2002, Revised... 12 June 2002