yes them poor queens??? save youre money don't by a wasp bane just nip between finger and thumb
I think it is such a shame when bee keepers lose touch with the balance of nature. By all means kill queen wasps before they establish their colonies. It's only the equivalent of letting 4-5 metric tonnes of insect pests live (per queen that you've killed) that'll then need pesticides to be controlled. Just don't complain if any of your bees are affected by pesticides or if there's a decline in natural fauna as a consequence of their 'indiscriminate' use!