If you put something with alcohol in the bees will not be interested, you don't have to use much or your best malt whiskey, some cheap vodka type drink works well as it tends to be fruit based and of course the alcohol keeps the bees out, I have three "wasp pipes" they are small cone shaped things that go in the neck of any plastic bottle, I use two litre bottle 1/3 full and I had to empty out about 1000 wasps from each last week, you can get them on ebay, very simple but effective,