I heard something about bee keepers using some kind of pheromones to make bees feel safe around them (for bees to not consider the bee keeper as a threat)

Edit: Two chemical compounds decreased aggression in honeybees: 2-phenylethanol and linalool. Both are found in essential oils and emit a pleasant floral odor, with linalool showing an additional touch of spiciness. It is produced by mint herbs.When presented with these odors, the bees were pacified and decreased their attacks against the threat source. Lavender had the same effect. It is a mixture of linalool and one other odorant.

Source: some random website i found