You may want to look into Paul Stamets’ research into this. He’s the mushroom guy, and he’s doing a pilot study with beekeepers, giving bees diluted extracts from certain kinds of mycelium. As of the last talk I heard him give about it, none of those colonies have collapsed.

There’s a whole 20-year story that led to him testing this, starting with noticing when his bees spent a few days pushing wood chips aside to get at Garden Giant mycelium and licking it, which puzzled him.

https://www.forbes.com/sites/grrlscientist/2017/06/05/can-a-...