fian
Field Bee
A velutina nest has 5-7 horizontal brood combs. Which makes him think that the worker that arrives will go directly to the honeycomb where the queen is. Furthermore, if the work is specialized (like a hive), the entourage of nurses that cares for the queen will be in charge of minimizing the risks. Furthermore, what makes you think that the workers will accept a forager coated in custard again if they have already observed that the substance is poisonous? God does not play dice and in nature animals do not play Russian roulette twice either.
We aren’t trying to kill the workers, only the queen, she is the ONLY target, a small amount will kill her. Once she is gone the nest is finished, the workers redundant and the issue is gone, no queens released and no further issue.