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["Alan Haigh" <alandhaigh@gmail.com>]

Home Depot usually sells a simple reusable trap this time of the year that I refill with Chinese apple juice concentrate instead of expensive lures.  No meat necessary, works fine but you'll need at least fifty of the suckers to make a big dent.  You dump out the drowned wasps about once every 5 days.

 

Less conveniently but much more economically you can cut 1 litre  plastic soda bottles a couple of inches below the top and invert it into a volcano shape.  Fill with a quarter can of apple juice concentrate and 3 parts water and place all around your property.  Works as well as the commercial trap but is difficult to hang from trees which is what I use them for.

 

If I hang 2 of them on a medium small free-standing fruit tree they usually stop damaging fruit and become much less a threat while harvesting.